Windows Efficiency Reservoir is a malicious software that will display fake alerts, claiming malware has been detected on your computer.This security alerts are professional looking pop-ups and when you click on them, you’re advised to buy Windows Efficiency Reservoir in order to remove the detected threats.
In reality, none of the reported issues are real, and are only used to scare you into buying Windows Efficiency Reservoir and stealing your personal financial information.
If you’ve got a Windows Efficiency Reservoir infection , you’ll be seeing this screens :

Registration codes for Windows Efficiency Reservoir

As an optional step,you can use one of the following license key to register Windows Efficiency Reservoir and stop the fake alerts.
0W000-000B0-00T00-E0020
Please keep in mind that entering the above registration code will NOT remove Windows Efficiency Reservoir from your computer , instead it will just stop the fake alerts so that you’ll be able to complete our removal guide more easily.
We strongly advise you to follow our Windows Efficiency Reservoir removal guide and ignore any alerts that this malicious software might generate.Under no circumstance should you buy this rogue security software as this could lead to identity theft.

Removal guide for Windows Efficiency Reservoir

STEP 1 : Start your computer in Safe Mode with Networking

Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer.
Press and hold the F8 key as your computer restarts.Please keep in mind that you need to press the F8 key before the Windows start-up logo appears.
On the Advanced Boot Options screen, use the arrow keys to highlight Safe Mode with Networking , and then press ENTER.
Log on to your computer with a user account that has administrator rights

STEP 2: Remove Windows Efficiency Reservoir malicious proxy server

Windows Efficiency Reservoir may add a proxy server which prevents the user from accessing the internet,follow the below instructions to remove the proxy.

Start Internet Explorer and if you are using Internet Explorer 9 ,click on the gear icon (Tools for Internet Explorer 8 users) ,then select Internet Options.
Go to the tab Connections.At the bottom, click on LAN settings.
Uncheck the option Use a proxy server for your LAN. This should remove the malicious proxy server and allow you to use the internet again.

If you are a Firefox users, go to Firefox(upper left corner) → Options → Advanced tab → Network → Settings → Select No Proxy

STEP 3: Run RKill to terminate known malware processes associated with Windows Efficiency Reservoir.

RKill is a program that attempts to terminate any malicious processes associated with Windows Efficiency Reservoir ,so that your normal security software can then run and clean your computer of infections.

As RKill only terminates a program’s running process, and does not delete any files, after running it you should not reboot your computer as any malware processes that are configured to start automatically will just be started again.

While your computer is in Safe Mode with Networking ,please download the latest official version of RKill.
Double-click on the RKill iconin order to automatically attempt to stop any processes associated with Windows Efficiency Reservoir.
RKill will now start working in the background, please be patient while the program looks for various malware programs and tries to terminate them.

IF you receive a message that RKill is an infection, that is a fake warning given by the rogue. As a possible solution we advise you to leave the warning on the screen and then try to run RKill again.Run RKill until the fake program is not visible but not more than ten times.
IF you continue having problems running RKill, you can download the other renamed versions of RKill from here.
When Rkill has completed its task, it will generate a log. You can then proceed with the rest of the guide.

WARNING: Do not reboot your computer after running RKill as the malware process will start again , preventing you from properly performing the next step.

STEP 4: Remove Windows Efficiency Reservoir malicious files with Malwarebytes Anti-Malware FREE

Please download the latest official version of Malwarebytes Anti-Malware FREE.
Install Malwarebytes’ Anti-Malware by double clicking on mbam-setup.
When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing, make sure you leave both the Update Malwarebytes’ Anti-Malware and Launch Malwarebytes’ Anti-Malware checked. Then click on the Finishbutton. If Malwarebytes’ prompts you to reboot, please do not do so.
Malwarebytes Anti-Malware will now start and you’ll be prompted to start a trial period , please select ‘Decline‘ as we just want to use the on-demand scanner.
On the Scanner tab,please select Perform full scan and then click on the Scan button to start scanning your computer for any possible infections.
Malwarebytes’ Anti-Malware will now start scanning your computer for Windows Efficiency Reservoir malicious files as shown below.
When the scan is finished a message box will appear, click OK to continue.
You will now be presented with a screen showing you the malware infections that Malwarebytes’ Anti-Malware has detected.Please note that the infections found may be different than what is shown in the image.Make sure that everything is Checked (ticked) and click on the Remove Selected button.
Malwarebytes’ Anti-Malware will now start removing the malicious files.If during the removal process Malwarebytes will display a message stating that it needs to reboot, please allow this request.

STEP 5: Double check your system for any left over infections with HitmanPro

This step can be performed in Normal Mode ,so please download the latest official version of HitmanPro.
Double click on the previously downloaded file to start the HitmanPro installation.

NOTE : If you have problems starting HitmanPro, use the “Force Breach” mode. Hold down the left CTRL-key when you start HitmanPro and all non-essential processes are terminated, including the malware process. (How to start HitmanPro in Force Breach mode – Video)
Click on Next to install HitmanPro on your system.
The setup screen is displayed, from which you can decide whether you wish to install HitmanPro on your machine or just perform a one-time scan, select a option then click on Next to start a system scan.
HitmanPro will start scanning your system for malicious files. Depending on the size of your hard drive, and the performance of your computer, this step will take several minutes.
Once the scan is complete,a screen displaying all the malicious files that the program found will be shown as seen in the image below.After reviewing each malicious object click Next.
Click Activate free license to start the free 30 days trial and remove the malicious files.
HitmanPro will now start removing the infected objects, and in some instances, may suggest a reboot in order to completely remove the malware from your system. In this scenario, always confirm the reboot action to be on the safe side.

STEP 6: Remove the residual damage from Windows Efficiency Reservoir

Windows Efficiency Reservoir may also modify your HOSTS file default settings, which can cause browser redirects or errors while trying to access antivirus and security websites.

To protect itself, Windows Efficiency Reservoir has changed the permissions of the HOSTS file so you can’t edit or delete it.

Please download the following batch fileto revert your HOSTS file permissions:
Download hostfix.bat (Size: 134 bytes)
Click on hostfix.bat and allow this file to run.Once it starts you will see a small black window that opens and then quickly goes away, then you should be able access your HOSTS file.
Please download and run the below file from Microsoft to revert your host file to its original settings.Please note that if you have added custom entries to your HOSTS file then you will need to add them again after restoring the default HOSTS file.

If you are still experiencing problems while trying to remove Windows Efficiency Reservoir from your machine, please start a new thread in our Malware Removal Assistance forum.

What’s next? Join our amazing community and build up your malware defenses !

How to Stay Safe Online

Here are 10 basic security tips to help you avoid malware and protect your device:

Use a good antivirus and keep it up-to-date.

It's essential to use a good quality antivirus and keep it up-to-date to stay ahead of the latest cyber threats. We are huge fans of Malwarebytes Premium and use it on all of our devices, including Windows and Mac computers as well as our mobile devices. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.
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Be careful what you download.

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Back up your data.

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To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.

Remove Windows Efficiency Reservoir – uninstall instructions