How to remove the msdefender virus

Most antivirus programs identify msdefender.exe as malware—for instance TrendMicro identifies it as TROJ_PAKES.ZL, and Microsoft identifies it as Trojan:Win32/Ircbrute or Trojan:Win32/Malagent.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the msdefender.exe malware

Msdefender.exe file information

The process known as btnfgpfhnrekeukt appears to belong to software pprfhlbhhnpqnbi by iiikdbeq.

Description: Msdefender.exe is not essential for Windows and will often cause problems. Msdefender.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 59,904 bytes (33% of all occurrences), 65,026 bytes, 159,746 bytes, 60,928 bytes or 176,130 bytes. 
There is no file information. The file is located in the Windows folder, but it is not a Windows core file. The process starts when Windows starts (see Registry key: MACHINE\Run, Run). The program uses ports to connect to or from a LAN or the Internet. The msdefender.exe file is not a Windows core file. The program is not visible. Msdefender.exe is able to manipulate other programs. Therefore the technical security rating is 88% dangerous.

Recommended: Identify msdefender.exe related errors

If msdefender.exe is located in a subfolder of the user's profile folder, the security rating is 60% dangerous. The file size is 253,952 bytes. The program is not visible. The process starts upon Windows startup (see Registry key: MACHINE\Run, Run). Msdefender.exe is not a Windows core file. Msdefender.exe is able to monitor applications and manipulate other programs. msdefender.exe appears to be a compressed file.

Important: You should check the msdefender.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


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Best practices for resolving msdefender issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active msdefender process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the msdefender.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

msdefender.exe [all]