The PUP.Optional.InstallBrain.A is a recent variation of dangerous adware infections that are designed to run commercial ad campaigns on the web. The PUP.Optional.InstallBrain.A is used by the hackers to promote certain types of websites, and products, and also run pop-up ads regarding coupon deals as well as discounted offers. Spam email attachments, peer to peer sharing of files, visiting porn websites, and removable devices are just a few ways through which this malicious application distributed. As this infection changes most of the default system settings due to which you can face a number of issues such as blockage of important system utilities, inaccessibility of the data files, internet connection problems, and overall degradation in the performance of the computer. The hackers use this virus as a tool to promote the third party products or services through pop-up ads. Once installed, it keeps redirecting your search queries towards unknown websites where you can get additional infections. This malicious application is a serious threat for the privacy of your data and can steal your personal details.

Removal of PUP.Optional.InstallBrain.A

As soon as you detect the PUP.Optional.InstallBrain.A on your computer, your first priority must be to find a way through which you can remove this infection completely. The manual removal process is available and only recommended for the advanced level users as. On the other hand, the automatic removal is also available which is not only easy, but also quick. The manual removal instructions are detailed below:-

Change the Mode of Operation from Normal to Safe Mode

Before starting the manual removal, you need to boot your PC in the safe mode. Restart the computer, and hit the F8 key repeatedly while the system is restarted to see the list of boot options. Select the safe mode from the list and press the Enter key to start the safe mode operation on your computer.

End the Malicious Processes

Once the system starts working in the safe mode, you have to access the windows task manager by using the Ctrl+Alt+Delete keys together. Hit the Processes tab in the task manager window to see all the processes running in the background of your system. Remove the following suspicious processes as soon as possible:-


Remove the Associated Data

You are also required to remove the following associated files of this malicious application from the system files folder:-

  • %Desktopdir%\PUP.Optional.InstallBrain.A.lnk
  • %Programs%\PUP.Optional.InstallBrain.A\PUP.Optional.InstallBrain.A.lnk

Reverse the Modification in the Windows Registry

Open the registry editor by executing the Regedit command through “Run” option available in the start menu. Once the registry editor is accessed, delete the following entries associated with PUP.Optional.InstallBrain.A:-

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\PUP.Optional.InstallBrain.A\DisplayIcon %AppData%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe,0
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\PUP.Optional.InstallBrain.A
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\PUP.Optional.InstallBrain.A\UninstallString “%AppData%[RANDOM CHARACTERS][RANDOM CHARACTERS].exe” -u
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce\[RANDOM CHARACTERS] %AppData%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\PUP.Optional.InstallBrain.A\ShortcutPath “%AppData%\[RANDOM CHARACTERS]\[RANDOM CHARACTERS].exe” -u
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\PUP.Optional.InstallBrain.A\DisplayName PUP.Optional.InstallBrain.A

Close the registry editor, before restarting the system in the normal mode to see the success or failure of the manual removal process. Run a complete system scan through an updated version of your existing antivirus software to get rid of the infections caused by this virus.


Disclaimer: Altering your windows registry items and other computer files should only be attempted by knowledgeable computer users. Errors in registry items may lead to some technical problems affecting other aspects of your machine. We advise you to attempt all these manual steps at your own risk, or else it is better use the Automatic PUP.OPTIONAL.INSTALLBRAIN.A removal Tool.


This is most safe and easy method. Download PUP.OPTIONAL.INSTALLBRAIN.A Removal Tool to automatically remove PUP.OPTIONAL.INSTALLBRAIN.A and its related files.

If you need any technical assistance in removing the PUP.OPTIONAL.INSTALLBRAIN.A,do submit your comments to get clarified.

How to Remove PUP.Optional.InstallBrain.A?
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