What is wmiapsrv.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 wmiapsrv.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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Wmiapsrv.exe file information

Windows Task Manager with wmiapsrv
Wmiapsrv.exe process in Windows Task Manager

The process known as WMI Performance Adapter Service or WMI Performance Reverse Adapter belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original wmiapsrv.exe from Microsoft is an important part of Windows, but often causes problems. The wmiapsrv.exe file is located in a subfolder of C:\Windows\System32 (typically C:\WINDOWS\System32\wbem\). Known file sizes on Windows 10/8/7/XP are 126,464 bytes (95% of all occurrences), 136,192 bytes, 137,728 bytes or 727,040 bytes. 
The wmiapsrv.exe file is a Windows core system file. The program has no visible window. The file is a Microsoft signed file. Wmiapsrv.exe is able to monitor applications. Therefore the technical security rating is 5% dangerous, however you should also read the user reviews.

Recommended: Identify wmiapsrv.exe related errors

Viruses with the same file name

Is wmiapsrv.exe a virus? No, it is not. The true wmiapsrv.exe file is a safe Microsoft Windows system process, called "WMI Performance Adapter Service". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are such as Generic.dx!mvl (detected by McAfee), and Backdoor.Win32.Wollf.a or UDS:DangerousObject.Multi.Generic (detected by Kaspersky).
To ensure that no rogue wmiapsrv.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants?

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


User Comments

Do windows XP really need this as a "critical service"?
Microsoft signed file so must be okay
This is a windows performance monitoring tool. It is currently filled with bugs including memory leaks. I recomend disabling it in your services.
  lord_demion   (further information)
it can be dangerous.. And you can just terminate it. Useless and possible spyware
  haistakaa paska koko valtiovalta  
It can be disabled, not necessary indeed
I've had it disabled for a couple years now w XP, no issues
  Danny B  
  Hans Jürgen Strunz  
it's in my XP Sys32 as part of SP2 - NOD32 AV says it's clean
very important dont remove!!!
  kyrpä perseeseen  
This process has opened many ports on my computer, tracks my app usage and hides itself. There is also much more going on in my PC but not sure if all related to this.

Rating chart

Summary: Average user rating of wmiapsrv.exe: based on 19 votes with 12 user comments. 5 users think wmiapsrv.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 7 users think it's neither essential nor dangerous. 3 users suspect danger. 3 users think wmiapsrv.exe is dangerous and recommend removing it. 3 users don't grade wmiapsrv.exe ("not sure about it").

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Best practices for resolving wmiapsrv issues

A clean and tidy computer is the key requirement for avoiding problems with wmiapsrv. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the wmiapsrv.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

wmiapsrv.exe [all]