What is msfwsvc.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the msfwsvc.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Msfwsvc.exe file information

Windows Task Manager with msfwsvc
Msfwsvc.exe process in Windows Task Manager

The process known as OneCare Firewall service belongs to software Microsoft Protection Service or Windows Live OneCare by Microsoft (

Description: Msfwsvc.exe is not essential for the Windows OS and causes relatively few problems. The msfwsvc.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 755,264 bytes (70% of all occurrences), 869,952 bytes or 802,120 bytes. 
The program has no visible window. The file has a digital signature. It is not a Windows core file. The program can be removed using the Control Panel's Add\Remove programs applet. Therefore the technical security rating is 21% dangerous.

Uninstalling this variant: You might want to safely remove the program using the uninstall program of Microsoft Protection Service or Windows Live OneCare (Control Panel ⇒ Uninstall a Program).

Recommended: Identify msfwsvc.exe related errors

If msfwsvc.exe is located in a subfolder of C:\Windows, the security rating is 90% dangerous. The file size is 1,429,651 bytes. There is no description of the program. Msfwsvc.exe is an unknown file in the Windows folder. The program has no visible window. The process uses ports to connect to or from a LAN or the Internet. Msfwsvc.exe is not a Windows system file. Msfwsvc.exe is able to hide itself.

Important: Some malware camouflages itself as msfwsvc.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the msfwsvc.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 msfwsvc issues

A clean and tidy computer is the key requirement for avoiding problems with msfwsvc. 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.

To help you analyze the msfwsvc.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

msfwsvc.exe [all]