Most antivirus programs identify winfirewall.exe as malware—e.g. Microsoft identifies it as Worm:Win32/Ainslot.A or Trojan:Win32/Dynamer!ac, and TrendMicro identifies it as TROJ_GEN.R42E1JS or TROJ_SPNV.03BM14.
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Description: Winfirewall.exe is not essential for Windows and will often cause problems. The winfirewall.exe file is located in a subfolder of the user's profile folder.
The file size on Windows 10/8/7/XP is 294,912 bytes.
There is no information about the author of the file. The program is not visible. It is not a Windows core file. Winfirewall.exe is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 75% dangerous.
Recommended: Identify winfirewall.exe related errors
If winfirewall.exe is located in a subfolder of C:\, the security rating is 74% dangerous. The file size is 275,968 bytes. It is a file with no information about its developer. The program has no visible window. The software starts when Windows starts (see Registry key: MACHINE\Run, Run, win.ini). The winfirewall.exe file is not a Windows system file. Winfirewall.exe is able to record keyboard and mouse inputs and manipulate other programs.
If winfirewall.exe is located in a subfolder of "C:\Program Files", the security rating is 42% dangerous. The file size is 557,056 bytes. The program is not visible. The file is not a Windows core file. Winfirewall.exe is able to record keyboard and mouse inputs and manipulate other programs.
If winfirewall.exe is located in the C:\Windows\System32 folder, the security rating is 70% dangerous. The file size is 758,272 bytes.
Important: You should check the winfirewall.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.
The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active winfirewall process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the winfirewall.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.