> VilmaTech Blog > How to Remove Win32:InstalleRex-BO [PUP], Latest Manual Guidance

How to Remove Win32:InstalleRex-BO [PUP], Latest Manual Guidance

Win32:InstalleRex-BO [PUP] Details

Win32:InstalleRex-BO [PUP] stands for a Potentially Unwanted Program noted for characteristics that may be undesired for PC users even if it’s not overtly malignant to a user’s computer. As a matter of fact, Win32:InstalleRex-BO [PUP] cannot be absolutely classified as a computer virus, but the application can be destructive due to it often overlaps with numerous additional threats, such as spyware, adware, dialers or other unclear subjects that could trigger a variety of damaging activities on the affected computer. Win32:InstalleRex-BO [PUP], much as the name shows, it mainly attacks Win32 compatible PCs, especially those are short of appropriate security protection. Once being installed, the PUP generally inserts its programmed code and created registry files to mess up default system running environment. Basically, Win32:InstalleRex-BO [PUP] may alter the work of MBR (Master Boot Record), one part of system controlling the operating system’s boot loader, in order to allow the PUP to run automatically whenever Windows is launched.

By making use of all possible found security vulnerabilities, the extra threats bundled with Win32:InstalleRex-BO [PUP] may be activated and executed without any permission or consent. Typically, a multitude of pop-up advertisements, some of examples of which are banners, ads revenue or coupons, may display on the monitor to interfere with PC user’s regular browsing routine. Apart from the apparent symptom, Win32:InstalleRex-BO [PUP]’s relative threats may also decrease the overall performance of affected computer via taking up a large amount of computing resources, and potentially result in high CPU utilization. Provided hazardous rootkit malware is dropped and installed, the infection may steal valuable information off PC users, and even open a backdoor to public, permitting cyber criminals to access the Windows that has been attacked without legal authorization. Without any doubts, Win32:InstalleRex-BO [PUP] should be eliminated once being informed of its presence to avoid unexpected damage for good.

Note: The following manual removal requires certain PC tech knowledge. Any mistake may lead to worse results, such as data loss and even computer crash. If you cannot deal with the operation alone, you’d better ask professional help from VilmaTech Certified 24/7 online expert here to resolve your problem properly and safely.

live chat

Way to Get Infected with Win32:InstalleRex-BO [PUP]

Similar as recent PUP.Optional.PicEnhance.A threat, Win32:InstalleRex-BO [PUP] may infiltrate onto a user’s computer without user’s precise awareness. Usually, Win32:InstalleRex-BO [PUP] may be manually downloaded onto a user’s computer in conjunction with the particular program that PC user wants. According to recent security research shows, Win32:InstalleRex-BO [PUP]is often packaged with certain pirated or illegally acquired software shared on networks. PC users may get infected with this malady via visiting some compromised websites, including some peer-to-peer file sharing websites carrying the activation code of the PUP. Additionally, Win32:InstalleRex-BO [PUP] may attach itself to a spam email message as a bogus link or ZIP attachment.

Remove Win32:InstalleRex-BO [PUP] With Manual Steps

Win32:InstalleRex-BO [PUP] may be detected by some antivirus software programs such as Avast, MSE or Norton. However, by taking advantage of its progressive rootkit capabilities, Win32:InstalleRex-BO [PUP] can always bypass the full detection and auto removal by antivirus easily. In this case, you may consider the helpful manual approach to clean up all its components from computer step by step. Here is how:

1. Kill the process of Win32:InstalleRex-BO [PUP].

  • Hit Ctrl+Alt+Delete key together.
  • In Windows Task Manager window, click on Process tab.
  • Scroll down and find the running process relative to Win32:InstalleRex-BO [PUP].
  • Right-click to stop it.

task manager end process

2. Show hidden files associated to Win32:InstalleRex-BO [PUP].

For Windows 7&Vista users:

  • Click on the Start icon showing on the desktop.
  • Choose Control Panel option.

controlp wondows

  • Click on Appearance and Personalization link.
  • In the next pop-up Appearance and Personalization window, select Folder Options.


  • Click on the View tab in Folder Options window.


  • Choose the Show hidden files, folders, and drives under the Hidden files and folders category.
  • Apply ok to make confirmation.

For Windows 8 users:

  • Click on Start menu.
  • Choose Windows Explorer icon.


  • In Libraries window, click View tab.


  • Select Folder Options , and then click View tab in it.
  • Choose Show hidden files, folders, and drives radio button under Hidden files and folders category under Advanced settings, and apply ok.

3. Remove files created by Win32:InstalleRex-BO [PUP].

local disk c
%AllUsersProfile%\Application Data\.exe

4. Remove all registry files of Backdoor:Win32/Caphaw.AG.

  • Click “Start” button and selecting “Run.”
  • Type “regedit” in the search box and click “OK.”
  • In the opened Registry Editor window, find the registry entries related to Win32:InstalleRex-BO [PUP].
  • Right-click to delete them all.

registry editor2

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Settings “net
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current\Winlogon\

Video Guide on How to Backup Windows Registry Entries

In Conclusion

Win32:InstalleRex-BO [PUP] is particular program that may be unwanted for PC users, despite the possibility that users are consented to download it on PCs. In reality, Win32:InstalleRex-BO [PUP] itself may not be harmful or dangerous as a typical PUP application. However, it could be destructive as it often overlaps with numerous additional PC security threats, such as adware, spyware or other unclear subject that has the capabilities to carry out a variety of damaging activities on the compute that it infects. Most commonly, threats relative to Win32:InstalleRex-BO [PUP] may boost website traffic by forcibly displaying lots of pop-up advertisements on the screen to meddle with user’s browsing experience. On the other hand, the infection may significantly slow down the performance of Windows via occupying high computing resources. The worse thing is, Win32:InstalleRex-BO [PUP]’s related viruses may even open a backdoor for remote hackers, allowing them to access targeted machine for further attack. It is certain that users are obliged to get rid of Win32:InstalleRex-BO [PUP] virus timely to safeguard computer against worse results.

Tip: If you are not familiar with the manual removal of Win32:InstalleRex-BO [PUP], and do not want to make mistake, please be free to contact VilmaTech Certified 24/7 online expert here , who will be glad to help you out of trouble.

live chat

Comments are closed.

Latest Posts