Most antivirus programs identify WinMgmt.exe as malware—for instance Kaspersky identifies it as Backdoor.Win32.DsBot.jm or Packed.Win32.Black.a, and Microsoft identifies it as TrojanDropper:Win32/Hupigon.F or Trojan:Win32/Sisproc.
The WinMgmt.exe file is a software component of Windows by Microsoft. Microsoft Windows 2000 Server, W2K Advanced Server, and W2K Professional Edition contain this module to allow managers in an enterprise environment to inspect and control client application performance. To avoid excess CPU usage by Winmgmt.exe in computers that also have WMI, (Windows Management Instrumentation), set WMI to log "errors only."
WInMgmt stands for WIndows Management Instrumentation
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Description: WinMgmt.exe is not essential for Windows and will often cause problems. WinMgmt.exe is located in the C:\Windows folder.
Known file sizes on Windows 8/7/XP are 59,392 bytes (66% of all occurrences) or 468,480 bytes.
There is no file information. The program has no visible window. The program is loaded during the Windows boot process (see Registry key: Winlogon\Shell, win.ini). WinMgmt.exe is not a Windows system file. It is an unknown file in the Windows folder. The software uses ports to connect to or from a LAN or the Internet. WinMgmt.exe is able to record keyboard and mouse inputs, hide itself and monitor applications. Therefore the technical security rating is 90% dangerous; however you should also read the user reviews.
Recommended: Identify WinMgmt.exe related errors
External information from Paul Collins:
There are different files with the same name:
Important: You should check the WinMgmt.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.
A clean and tidy computer is the key requirement for avoiding problems with WinMgmt. 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 doing a repair of your installation, or in the case of Windows 8, 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 WinMgmt.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.