Remove PUP.Optional.WebSteroids (Virus Removal Guide)

PUP.Optional.WebSteroids is a specific detection used by Malwarebytes Anti-Malware and other antivirus products to indicate and detect a Potentially Unwanted Program.
A potentially unwanted application is a program that contains adware, installs toolbars or has other unclear objectives.

PUP.Optional.WebSteroids it’s technically not a virus, but it does exhibit plenty of malicious traits, such as rootkit capabilities to hook deep into the operating system, browser hijacking, and in general just interfering with the user experience. The industry generally refers to it as a “PUP,” or potentially unwanted program.
The PUP.Optional.WebSteroids infection is used to boost advertising revenue, as in the use of blackhat SEO, to inflate a site’s page ranking in search results.

PUP.Optional.WebSteroids got on your computer after you have installed a freeware software (video recording/streaming, download-managers or PDF creators) that had bundled into their installation this browser hijacker. This Potentially Unwanted Propgram is also bundled within the custom installer on many download sites (examples: CNET, Brothersoft or Softonic), so if you have downloaded a software from these websites, chances are that PUP.Optional.WebSteroids was installed during the software setup process.

PUP.Optional.WebSteroids is an ad-supported (users may see additional banner, search, pop-up, pop-under, interstitial and in-text link advertisements) cross web browser plugin for Internet Explorer (BHO) and Firefox/Chrome (plugin) and distributed through various monetization platforms during installation. The browser extension includes various features that will modify the default or custom settings of the browser including the home page, search settings and in some cases will modify Internet Explorer’s load time threshold, place a lock file within Firefox to prevent competing software from changing its settings as well as disable the browser’s Content Security Policy in order to allow for cross site scripting of the plugin.

You should always pay attention when installing software because often, a software installer includes optional installs, such as this PUP.Optional.WebSteroids browser hijacker. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don’t trust.

How to remove PUP.Optional.WebSteroids (Virus Removal Guide)

This page is a comprehensive guide, which will remove PUP.Optional.WebSteroids from Internet Explorer, Firefox and Google Chrome.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, STOP and ask for our assistance.
STEP 1: Remove PUP.Optional.WebSteroids adware with AdwCleaner
STEP 2: Remove PUP.Optional.WebSteroids virus with Malwarebytes Anti-Malware Free
STEP 3: Double-check for the PUP.Optional.WebSteroids infection with HitmanPro

STEP 1: Remove PUP.Optional.WebSteroids adware with AdwCleaner

The AdwCleaner utility will scan your computer for PUP.Optional.WebSteroids malicious files and registry keys, that may have been installed on your computer without your knowledge.

1. You can download AdwCleaner utility from the below link.
   Download AdwCleanerFree official download. Nothing to install.
2. Before starting AdwCleaner, close all open programs and internet browsers, then double-click on the AdwCleaner icon.
   
   If Windows prompts you as to whether or not you wish to run AdwCleaner, please allow it to run.
3. When the AdwCleaner program will open, click on the Scan button as shown below.
   
   AdwCleaner will now start to search for PUP.Optional.WebSteroids malicious files that may be installed on your computer.
4. To remove the PUP.Optional.WebSteroids malicious files that were detected in the previous step, please click on the Clean button.
   
   AdwCleaner will now prompt you to save any open files or data as the program will need to reboot the computer. Please do so and then click on the OK button.

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STEP 2: Remove PUP.Optional.WebSteroids virus with Malwarebytes Anti-Malware Free

Malwarebytes Anti-Malware Free utilizes Malwarebytes powerful technology to detect and remove all traces of malware including worms, trojans, rootkits, rogues, dialers, spyware and more.

1. You can download Malwarebytes Anti-Malware Free from the below link, then double-click on the icon named mbam-setup.exe to install this program.
   Download MalwarebytesFree official installer. Your download starts right away.
2. When the installation begins, keep following the prompts in order to continue with the setup process, then at the last screen click on the Finish button.
   
3. On the Scanner tab, select Perform full scan, and then click on the Scan button to start searching for the PUP.Optional.WebSteroids malicious files.
   
4. Malwarebytes’ Anti-Malware will now start scanning your computer for PUP.Optional.WebSteroids as shown below.
   
5. When the Malwarebytes Anti-Malware scan has finished, click on the Show Results button.
   
6. You will now be presented with a screen showing you the computer infections that Malwarebytes Anti-Malware has detected. Make sure that everything is Checked (ticked), then click on the Remove Selected button.
   

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STEP 3: Double-check for the PUP.Optional.WebSteroids infection with HitmanPro

HitmanPro is a second opinion scanner, designed to rescue your computer from malware (viruses, trojans, rootkits, etc.) that have infected your computer despite all the security measures you have taken (such as anti virus software, firewalls, etc.).

1. You can download HitmanPro from the below link:
   Download HitmanProOfficial Sophos download. Free scan, free 30-day trial to remove threats.
2. Double-click on the file named HitmanPro.exe (for 32-bit versions of Windows) or HitmanPro_x64.exe (for 64-bit versions of Windows). When the program starts you will be presented with the start screen as shown below.
   
   Click on the Next button, to install HitmanPro on your computer.
   
3. HitmanPro will now begin to scan your computer for PUP.Optional.WebSteroids malicious files.
   
4. When it has finished it will display a list of all the malware that the program found as shown in the image below. Click on the Next button, to remove PUP.Optional.WebSteroids adware.
   
5. Click on the Activate free license button to begin the free 30 days trial, and remove all the malicious files from your computer.
   

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Your computer should now be free of the PUP.Optional.WebSteroids infection. If your current anti-virus solution let this infection through, you may want to consider purchasing the PRO version of Malwarebytes Anti-Malware to protect against these types of threats in the future, and perform regular computer scans with HitmanPro.
If you are still experiencing problems while trying to remove PUP.Optional.WebSteroids from your machine, please start a new thread in our Malware Removal Assistance forum.