Windows 11 Malware Cleanup: Remove Trojans, Adware, and Browser Hijackers Safely
Written by: Stelian
Published on:
If your Windows 11 PC is suddenly flooded with pop-up ads, browser redirects, fake “virus” alerts, unknown programs, slowdowns, or strange background activity, you are likely dealing with malware. The tricky part is that many infections do not look like “classic viruses” anymore. Modern threats often show up as adware, browser hijackers, potentially unwanted programs (PUPs), password stealers, or trojans that quietly change settings and persist after reboot.
This guide is built for real search intent. If you searched for how to remove pop-up ads on Windows 11, adware removal, browser redirect virus, or malware cleanup for Windows 11, you’re in the right place. It walks you through a reliable removal process that fixes the root cause, not just the symptoms, and helps prevent the infection from coming back.
Use the steps below if your PC has any of these problems: pop-ups in Chrome/Edge/Firefox, constant redirects, “managed by your organization” browser messages, scam notifications, random apps installing themselves, Windows Defender turned off, or unexplained CPU/network usage.
Why Windows 11 Malware Often Looks Like “Pop-up Ads”
Many Windows 11 infections are designed to monetize you before they do anything else. That is why pop-up ads and redirects are one of the most common early symptoms. Adware and browser hijackers earn revenue by forcing your browser to load sponsored pages, injecting banners into websites, or sending you through redirect chains that pay affiliates.
But pop-ups are also how scammers push the next stage: fake updates, fake security tools, tech support scams, and installers that drop more serious malware. In other words, pop-ups can be the “front door” to bigger threats.
Common Malware Types on Windows 11
Different malware categories create different symptoms, but many overlap. On Windows 11, the most common types you will run into include:
Adware (pop-up ads, injected banners, random tabs, “deals” overlays)
No single symptom confirms malware, but these patterns strongly suggest it:
Pop-up ads appear even on trusted sites, or tabs open by themselves
Chrome/Edge/Firefox redirects to random domains or fake search engines
You accidentally allowed notifications and now see constant scam alerts
New apps appear that you did not install
Windows Defender is disabled or blocked from turning on
High CPU, disk, or network usage while you are doing nothing
Browser says “Managed by your organization” on a personal Windows 11 PC
Unknown startup apps, scheduled tasks, or services
Login alerts from email or social accounts you do not recognize
Before You Start: Two Safety Moves
Disconnect from the internet if you suspect a trojan or password stealer (this helps stop data theft and additional downloads).
Do not sign into sensitive accounts from the infected PC until cleanup is complete.
Removal Instructions for malware on Windows 11
This malware removal guide may appear overwhelming due to the number of steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy-to-understand instructions that anyone can use to remove malware for free. Please perform all the steps in the correct order. If you have any questions or doubts at any point, stop and ask for our assistance.
Windows 11 malware can show up as pop-up ads, adware, browser hijackers, trojans, and other threats. Follow the steps below to remove malware and repair the system changes it may have made.
First, we’ll manually check your computer for unknown or malicious programs. Adware and browser hijackers often have a working uninstall entry — removing them this way takes care of the easy part before we run the scanners.
Windows 11Windows 10Windows 8Windows 7
Open the Settings app
Press Windows + I on your keyboard to open Settings. Alternatively, right-click the Start button and select “Settings” from the menu.
Go to “Apps & Features”
In the Settings window, click “Apps” in the sidebar, then select “Apps & Features“.
Find and uninstall the malicious program
Scroll through the list of installed apps and look for anything suspicious — a program you don’t remember installing, or one with a strange or generic name. Quick tip: click “Sort by” and choose “Install date“. Malware is usually one of the most recently installed programs, so it will appear near the top.
When you find the malicious program, click the three dots next to it and select “Uninstall“.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
Complete the uninstall
Confirm by clicking Uninstall in the message box, then follow the remaining prompts. Read each prompt carefully — some malicious programs use confusing wording or pre-ticked boxes hoping you’ll click through without looking.
Open the Settings app
Press Windows + I on your keyboard to open Settings. Alternatively, click the Start button on the taskbar and select “Settings” (the gear icon).
Click on “Apps”
In the “Windows Settings” window, click “Apps“. The “Apps & Features” section should open by default — if it doesn’t, select it from the list on the left.
Find and uninstall the malicious program
Scroll through the list of installed apps and look for anything suspicious — a program you don’t remember installing, or one with a strange or generic name. Quick tip: click “Sort by” and choose “Install date“. Malware is usually one of the most recently installed programs, so it will appear near the top.
When you find the malicious program, click on it and select “Uninstall“.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
Complete the uninstall
Confirm by clicking Uninstall in the message box, then follow the remaining prompts. Read each prompt carefully — some malicious programs use confusing wording or pre-ticked boxes hoping you’ll click through without looking.
Open “Programs and Features”
Right-click the Start button in the taskbar, then select “Programs and Features“. This takes you straight to the list of installed programs.
Find and uninstall the malicious program
Scroll through the list of installed programs and look for anything suspicious — a program you don’t remember installing, or one with a strange or generic name. Click to highlight it, then click the “Uninstall” button.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
Complete the uninstall
Confirm by clicking Yes in the message box, then follow the remaining prompts. Read each prompt carefully — some malicious programs use confusing wording or pre-ticked boxes hoping you’ll click through without looking.
Open the Control Panel
Click the “Start” button, then click “Control Panel“.
Click on “Uninstall a Program”
In the Control Panel, click “Uninstall a Program” under the Programs category.
Find and uninstall the malicious program
Scroll through the list of installed programs and look for anything suspicious — a program you don’t remember installing, or one with a strange or generic name. Click to highlight it, then click the “Uninstall” button.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
Complete the uninstall
Confirm by clicking Yes in the message box, then follow the remaining prompts. Read each prompt carefully — some malicious programs use confusing wording or pre-ticked boxes hoping you’ll click through without looking.
Is a stubborn program refusing to uninstall? Use Revo Uninstaller to force-remove it completely, including leftover files and registry entries.
With the malicious programs removed, you’re ready for the next step in this guide.
STEP 2: Reset browsers back to default settings
In this step, we will remove spam notifications, malicious extensions, and change to default any settings that might have been changed by malware. Please note that this method will remove all extensions, toolbars, and other customizations but will leave your bookmarks and favorites intact. For each browser that you have installed on your computer, please click on the browsers tab below and follow the displayed steps to reset that browser.
ChromeFirefoxMicrosoft EdgeInternet Explorer
Reset Chrome for Windows to default settings
We will now reset your Chrome browser settings to their original defaults. This will reset your startup page, new tab page, search engine, and pinned tabs. It will also disable all extensions and clear temporary data like cookies. Your favorites, history, and saved passwords will not be cleared.
Open the Chrome menu
In the top-right corner of Chrome, click the three-dot (⋮) icon to open the menu.
Go to Settings
From the menu, select Settings.
Select “Reset settings”
In the left sidebar, scroll down and click Reset settings.
Choose “Restore settings to their original defaults”
Click Restore settings to their original defaults.
Confirm the reset
In the dialog that appears, click Reset settings. This restores your homepage, search engine, new tab page, and pinned tabs to default, disables all extensions, and clears temporary site data — undoing the changes the malware made.
Don’t worry: your bookmarks, history, and saved passwords are safe and will not be deleted.
Reset Firefox for Windows to default settings
We will now reset your Firefox browser settings to their default. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history, and open tabs.
Open the Firefox menu and click “Help”
Click the three horizontal lines in the top-right corner of Firefox to open the main menu, then select “Help“.
Click “More troubleshooting information”
In the Help menu, click “More troubleshooting information“.
Click “Refresh Firefox”
On the “Troubleshooting Information” page, click the “Refresh Firefox” button in the top-right area of the page.
Confirm the refresh
In the confirmation window, click “Refresh Firefox” again. This removes extensions, themes, and customized settings — the usual hiding places for browser hijackers — while keeping your bookmarks, history, and saved passwords safe.
Click “Finish”
Firefox will close, reset itself to default settings, and reopen with a window listing the information that was restored. Click “Finish” — your Firefox is now clean.
About the “Old Firefox Data” folder: Firefox saves a copy of your old profile on your desktop. If something you need is missing after the reset, you can recover it from this folder. Otherwise, delete the folder — it contains sensitive data like passwords and cookies, and may also still hold the malicious files you just removed.
Reset Microsoft Edge to default settings
We will now reset your Microsoft Edge browser settings to their default. This will reset your startup page, new tab page, search engine, and pinned tabs. It will also disable all extensions and clear temporary data like cookies. Your favorites, history, and saved passwords will not be cleared.
Open the Edge menu and click “Settings”
Click the three dots (…) in the top-right corner of Microsoft Edge to open the main menu, then click “Settings“.
Click “Reset settings”
In the left sidebar, click “Reset settings“.
Click “Restore settings to their default values”
In the main window, click “Restore settings to their default values“.
Confirm by clicking “Reset”
In the confirmation dialog, click “Reset“. This restores your homepage, search engine, new tab page, and startup pages to default, disables all extensions, and clears temporary data like cookies — undoing the changes the malware made.
Don’t worry: your favorites, browsing history, and saved passwords are safe and will not be deleted.
Reset Internet Explorer to default settings
We will now reset your Internet Explorer browser settings to their default. You can reset Internet Explorer settings to return them to the state they were in when Internet Explorer was first installed on your computer.
Go to “Internet Options”.
Open Internet Explorer, click on the gear icon in the upper-right part of your browser, then select “Internet Options“.
Select the “Advanced” tab, then click “Reset”
In the “Internet Options” dialog box, select the “Advanced” tab, then click on the “Reset” button.
Click on “Reset”.
In the “Reset Internet Explorer settings” section, select the “Delete personal settings” checkbox, then click on the “Reset” button.
Click on “Close”.
When Internet Explorer has completed its task, click on the “Close” button in the confirmation dialogue box. Close your browser and then you can open Internet Explorer again.
STEP 3: Use Rkill to terminate suspicious programs
Next, we’ll download and run Rkill to stop any suspicious processes running in the background. This prevents the malware from interfering with the removal tools in the following steps.
RKill is a program that was developed at BleepingComputer.com that attempts to terminate known malware processes so that your normal security software can then run and clean your computer of infections. When RKill runs it will kill malware processes and then removes incorrect executable associations and fixes policies that stop us from using certain tools.
Download Rkill.
You can download RKill to your computer from the below link. When at the download page, click on the Download Now button labeled iExplore.exe. We are downloading a renamed version of Rkill (iExplore.exe) because some malware will not allow processes to run unless they have a certain filename.
RKILL DOWNLOAD LINK (The above link will open a new page from where you can download Rkill)
Run RKill.
After downloading, double-click the iExplore.exe icon to kill malicious processes. In most cases, downloaded files are saved to the Downloads folder. The program may take some time to search for and end various malware programs.
When it is finished, the black window will close automatically and a log file will open. Do not restart your computer. Proceed to the next step in this guide.
STEP 4: Use Malwarebytes to remove Trojans and unwanted programs
Now we’ll install Malwarebytes and run a full scan to detect and remove infections, adware, and potentially unwanted programs from your computer.
Malwarebytes is one of the most popular and trusted anti-malware tools for Windows — and it’s completely free for removing infections. It catches threats that many antivirus programs miss, including adware, browser hijackers, and trojans. Follow the steps below to scan and clean your PC in just a few minutes.
Download Malwarebytes
Click the button below to download the latest version of Malwarebytes for Windows from the official source. The free version is all you need — it will scan your computer and remove adware, browser hijackers, and other malicious software at no cost.
(The link opens in a new page where your download will start)
Install Malwarebytes
When the download finishes, open your Downloads folder and double-click the MBSetup file. If Windows shows a User Account Control pop-up, click “Yes” to allow the installation.
Follow the On-Screen Prompts to Install Malwarebytes
The setup wizard will walk you through a few quick screens:
Choose where you’re installing the program — “Personal Computer” or “Work Computer” — then click Next.
Malwarebytes will now install on your device. This usually takes under a minute.
When installation is complete, the “Welcome to Malwarebytes” screen will open automatically.
On the final screen, click Open Malwarebytes to launch the program.
Enable “Scan for Rootkits”
Before scanning, turn on rootkit detection so Malwarebytes can find even the most hidden threats. Click the Settings gear icon on the left side of the screen.
In the settings menu, find “Scan for rootkits” and click the toggle so it turns blue.
Done? Click “Dashboard” in the left pane to return to the main screen.
Start the Scan
Click the blue Scan button. Malwarebytes will automatically update its virus database and start checking your computer for malware.
Wait for the Scan to Finish
The scan checks your entire system for browser hijackers and other malicious programs, so it can take several minutes. Feel free to do something else — just check back occasionally to see the progress.
Quarantine the Detected Threats
When the scan is done, you’ll see a list of everything Malwarebytes found — malware, adware, and potentially unwanted programs. Click the “Quarantine” button to remove all of them at once.
Malwarebytes will now remove the malicious files and registry entries and move them safely into quarantine.
Restart Your Computer
Some threats can only be fully removed after a reboot. If Malwarebytes asks you to restart, click Yes. Once you’re logged back in, your PC is clean and you can continue with the next steps in this guide.
STEP 5: Use HitmanPro to remove rootkits and other malware
Next, we’ll run a second-opinion scan with HitmanPro to catch Trojans, rootkits, and other malicious programs that may have survived the previous step.
HitmanPro is a second-opinion scanner — it’s designed to catch what your main antivirus might have missed. Instead of relying on a single detection engine, it checks the behavior of files in the locations where malware usually hides. Anything suspicious gets sent to the cloud, where it’s analyzed by two of the best antivirus engines available: Bitdefender and Kaspersky.
Good news: scanning is completely free, with no limits. You only need a license when it’s time to remove what was found — and even then, you can activate a free one-time 30-day trial to clean your PC at no cost. (A full license is $24.95 per year for 1 PC.)
Download HitmanPro
Click the button below to download HitmanPro. Remember — the scan is free, so you have nothing to lose by checking your PC.
When the download finishes, open your Downloads folder and double-click the file: “hitmanpro.exe” on 32-bit Windows, or “hitmanpro_x64.exe” on 64-bit Windows.
If a User Account Control pop-up asks whether HitmanPro can make changes to your device, click “Yes” to continue.
Follow the On-Screen Prompts
On the HitmanPro start screen, click “Next” to begin the system scan. No lengthy setup required — it goes straight to work.
Wait for the Scan to Finish
HitmanPro will now check your computer for malicious programs. This usually takes just a few minutes thanks to its cloud-based scanning.
Review the Results and Click “Next”
When the scan is done, HitmanPro will show you everything it found. Click “Next” to remove the detected threats.
Click “Activate Free License”
To remove the malicious files, click the “Activate free license” button. This starts your free 30-day trial — no payment details needed — and unlocks the full cleanup.
When the removal is complete, HitmanPro will show a summary of everything it cleaned. Click Next, then click Reboot if prompted. If there’s no reboot prompt, just click Close — your PC is clean.
STEP 6: Use AdwCleaner to remove malicious browser policies and adware
We’ll now use AdwCleaner to remove malicious browser policies and unwanted browser extensions — the leftovers that keep hijacking your browser settings even after the malware itself is gone.
AdwCleaner is a free on-demand scanner that specializes in adware, browser hijackers, and unwanted toolbars — the exact threats that mainstream antivirus programs often miss. It also includes tools that repair the damage malware leaves behind, like hijacked browser settings and malicious policies. It’s a quick scan that’s well worth running.
Download AdwCleaner
Click the button below to download AdwCleaner — it’s free, portable, and requires no installation.
Open your Downloads folder and double-click the file named “adwcleaner_x.x.x.exe“. There’s no installation — the program starts right away.
If Windows asks whether you want to allow AdwCleaner to run, click “Yes“. When the license agreement appears, click I agree to continue.
Enable “Reset Chrome policies”
This setting removes malicious browser policies — a trick malware uses to lock your browser settings so you can’t change them back. Click “Settings” on the left side of the window, then turn on “Reset Chrome policies“.
Start the Scan
Click “Dashboard” on the left side of the window, then click the “Scan” button.
Wait for the Scan to Finish
AdwCleaner will now check your computer for adware and other malware. This usually takes only a few minutes — it’s one of the fastest scanners around.
Quarantine the Detected Threats
When the scan finishes, AdwCleaner will list everything it found. Click the “Quarantine” button to remove all the malicious items at once.
Click “Continue” to Finish the Cleanup
Save any open work first — AdwCleaner needs to close your open programs before it can clean. When you’re ready, click the “Continue” button.
AdwCleaner will now delete all detected malware from your computer. If it asks you to restart your PC, allow it — your computer will be clean when you log back in.
STEP 7: Perform a final check with ESET Online Scanner
Finally, we’ll run ESET Online Scanner as a last sweep to confirm nothing was missed. If this scan comes back clean, your computer is malware-free.
ESET Online Scanner is a free second-opinion scanner that performs a deep, full-system check for viruses, trojans, rootkits, and other malware. We use it as the final step because it’s thorough — if anything slipped past the previous scans, ESET will find it. A clean result here means your computer is malware-free.
Download ESET Online Scanner
Click the button below to download ESET Online Scanner.
When the download finishes, open your Downloads folder and double-click “esetonlinescanner.exe“.
Install ESET Online Scanner
On the start screen, select your language from the drop-down menu and click Get started.
On the Terms of use screen, click Accept.
Choose your preferences for the Customer Experience Improvement Program and the Detection feedback system (either choice is fine), then click Continue.
Start a Full Scan
Click Full Scan — this checks your entire computer, not just the common hiding spots.
Select Enable for Detection of Potentially Unwanted Applications — this lets ESET catch adware and bundled junk programs, not just viruses. Then click Start scan.
Wait for the Scan to Finish
ESET will now check every file on your computer. Because it’s a full scan, this can take a while — often an hour or more, depending on how much data you have. Leave it running in the background and check on it from time to time.
Review the Results
When the scan completes, the Found and resolved detections screen appears. Any threats found were automatically cleaned and quarantined — there’s nothing extra you need to do. Click View detailed results if you want to see exactly what was removed.
If ESET found nothing — congratulations, your computer has passed the final check and is malware-free.
After Malware Removal: Fix Browsers (Pop-ups, Redirects, and Hijacks)
Even after the Windows 11 cleanup is complete, browsers may still have leftover extensions, notification permissions, and hijacked settings. These quick steps help remove the “pop-up ads” and redirect symptoms that many users search for.
Refresh Firefox if needed: Help → More troubleshooting information → Refresh Firefox
If You Suspect Password Theft: Do This Immediately
Some Windows 11 malware is built to steal passwords, browser cookies, and saved sessions. If your infection involved unknown installs, Defender being disabled, or suspicious network activity, treat it as a credential risk.
From a clean device, change passwords for your email first, then banking, then everything else.
Enable multi-factor authentication (MFA) on key accounts.
Review account sign-in activity and sign out of unknown devices.
Clear browser cookies for sensitive sites and re-login.
When a Windows 11 Reset Is the Best Option
Most malware can be removed, but a reset is sometimes the safer choice. Consider backing up personal files and resetting Windows 11 if:
Security tools remain disabled or corrupted after cleanup
You keep getting reinfected after multiple cleanups
You suspect a remote access trojan (RAT) or password stealer
Financial accounts were accessed from the infected PC
You find unknown admin accounts or system-wide policy enforcement
FAQ: Windows 11 Malware Removal (Pop-ups, Adware, Redirects)
Why am I getting pop-up ads on Windows 11?
The most common causes are adware, notification spam you allowed in a browser, or a malicious extension. If multiple browsers are affected, a Windows-installed adware program is likely involved.
Why does my browser keep redirecting on Windows 11?
Redirects are often caused by browser hijackers, unwanted extensions, or enforced policies. On Windows 11, hijackers frequently install companion apps or scheduled tasks that reapply the hijack after reboot.
Is “Managed by your organization” on Windows 11 a malware sign?
On a personal PC, it can be. Policies can be set by legitimate software, but hijackers also use policies to lock your search engine, homepage, and extensions. If it appeared alongside redirects or pop-ups, treat it as suspicious.
Will resetting Chrome or Edge remove malware on Windows 11?
It removes many browser-level symptoms, but it does not remove Windows-installed adware or trojans. If the issue returns after a reset, the system-level infection is still present.
How can I prevent malware on Windows 11 in the future?
Download software only from official sources
Avoid cracks, keygens, and “free” bundles
Decline extra offers during installs (choose Custom install)
Do not click Allow on notification prompts from random sites
Keep Windows 11, browsers, and apps updated
Keep real-time protection enabled
10 Rules to Avoid Online Scams
Here are 10 practical safety rules to help you avoid malware, online shopping scams, crypto scams, and other online fraud. Each tip includes a quick “if you already got hit” action.
Stop and verify before you click, log in, download, or pay.
Most scams win by creating urgency. Verify using a trusted method: type the website address yourself, use the official app, or call a known number (not the one in the message).
If you already clicked: close the page, do not enter passwords, and run a malware scan.
Keep your operating system, browser, and apps updated.
Updates patch security holes used by malware and malicious ads. Turn on automatic updates where possible.
If you saw a scary “update now” pop-up: close it and update only through your device settings or the official app store.
Use layered protection: antivirus plus an ad blocker.
Antivirus helps block malware. An ad blocker reduces scam redirects, phishing pages, and malvertising.
If your browser is acting weird: remove unknown extensions, reset the browser, then run a full scan.
Install apps, software, and extensions only from official sources.
Avoid cracked software, “keygens,” and random downloads. During installs, choose Custom/Advanced and decline bundled offers you do not recognize.
If you already installed something suspicious: uninstall it, restart, and scan again.
Treat links and attachments as untrusted by default.
Phishing often impersonates delivery services, banks, and popular brands. If it is unexpected, do not open attachments or log in through the message.
If you entered credentials: change the password immediately and enable 2FA.
Shop safely: research the store, then pay with protection.
Be cautious with brand-new stores, “closing sale” stories, and prices that make no sense. Prefer credit cards or PayPal for dispute options. Avoid wire transfers, gift cards, and crypto payments.
If you already paid: contact your card issuer or PayPal quickly to dispute the transaction.
Crypto rule: never pay a “fee” to withdraw or recover money.
Common patterns include fake profits, then “tax,” “gas,” or “verification” fees. Another is a “recovery agent” who demands upfront crypto.
If you already sent crypto: stop paying, save evidence (wallet addresses, TXIDs, chats), and report the scam to the platform used.
Secure your accounts with unique passwords and 2FA (start with email).
Use a password manager and unique passwords for every account. Enable 2FA using an authenticator app when possible.
If you suspect an account takeover: change passwords, sign out of all devices, and review recent logins and recovery settings.
Back up important files and keep one backup offline.
Backups protect you from ransomware and device failure. Keep at least one backup on an external drive that is not always connected.
If you suspect infection: do not connect backup drives until the system is clean.
If you think you are a victim: stop losses, document evidence, and escalate fast.
Move quickly. Speed matters for disputes, account recovery, and limiting damage.
Stop payments and contact: do not send more money or respond to the scammer.
Call your bank or card issuer: block transactions, replace the card if needed, and start a dispute or chargeback.
Secure your email first: change the email password, enable 2FA, and remove unfamiliar recovery options.
Secure other accounts: change passwords, enable 2FA, and log out of all sessions.
Scan your device: remove suspicious apps or extensions, then run a full malware scan.
Save evidence: screenshots, emails, order pages, tracking pages, wallet addresses, TXIDs, and chat logs.
Report it: to the payment provider, marketplace, social platform, exchange, or wallet service involved.
These rules are intentionally simple. Most online losses happen when decisions are rushed. Slow down, verify independently, and use payment methods and account controls that give you recourse.
Stelian leverages over a decade of cybersecurity expertise to lead malware analysis and removal, uncover scams, and educate people. His experience provides insightful analysis and valuable perspective.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
Didn’t find any suspicious programs? That’s fine — not all infections install visible apps. Just continue with the next step in this guide.
