mofcomp.exe - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: exe for Windows system component management. Essential for device driver installation and system update processes. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	other	️ Not detected
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	ℹ️ Unverified	File Hash protection is missing.
File size	500 bytes.	500 bytes.

Hashes:

MD5: 4b04b8ac0d74b631a4d7bfb99ed61546
SHA-1: 519136114bb3b355ff1616d0c8b2f773a5eedcd9
SHA-256: 13ab1feeef6820f6d4f850f9996e20a8087c91f8d9b61b4c180fb298099f9e0f
SHA-512: 2247d7124e117b6c0f9c1e8a7598151e5859b492e33c60bdbfb19713dbbc8c4723f15efc3ba065dd26d7c4baf273ac0d8e50903e4d91033cc87a9516fc024c02

The mofcomp.exe utility is the Managed Object Format (MOF) compiler used by Windows to add classes and instances to the WMI (Windows Management Instrumentation) repository. If you are experiencing errors related to this file, it is usually due to corrupt WMI repositories, missing system paths, or damaged system files.

Here is how you can fix mofcomp.exe errors without downloading any external files or third-party software.

1. Fix the Windows Environment Path

If your system cannot find mofcomp.exe, your Windows environment variables might be misconfigured. The file naturally resides in the System32\wbem folder.

Press Windows Key + R, type sysdm.cpl, and hit Enter.
Go to the Advanced tab.
Click on Environment Variables.
Under System variables, locate and select Path, then click Edit.
Check if this line exists: %SystemRoot%\System32\Wbem (or C:\Windows\System32\Wbem).
If it is missing, click New and add it.
Click OK to save and restart your computer.

2. Run SFC and DISM Tools

Windows has built-in repair tools that can automatically replace missing or corrupted system files like mofcomp.exe.

Press the Windows Key, type cmd, right-click Command Prompt, and select Run as administrator.
Type the following command and press Enter: sfc /scannow
Wait for the scan to finish. If it finds errors it cannot fix, run the deployment image tool by typing: DISM /Online /Cleanup-Image /RestoreHealth
Restart your PC after the processes complete.

3. Rebuild the WMI Repository

If mofcomp.exe is crashing or throwing errors while compiling files, your WMI repository might be corrupted. You can reset it using the command prompt.

Open Command Prompt as an administrator.
Stop the WMI Service by running: net stop winmgmt
Run the following command to check the repository health: winmgmt /verifyrepository
If it reports that the repository is inconsistent, run: winmgmt /salvagerepository
If the issue persists, force a complete reset by running: winmgmt /resetrepository
Restart your computer.

4. Re-register WMI Components and MOF Files

If specific applications are failing because they cannot utilize mofcomp.exe, you can force Windows to re-compile all default MOF files.

Open Command Prompt as an administrator.
Switch to the WMI directory by typing: cd %windir%\system32\wbem
Run the following loop command to automatically compile every MOF file in the folder: for /f %s in ('dir /b *.mof') do mofcomp %s
Once completed, run this command to register the associated DLL files: for /f %s in ('dir /b *.dll') do regsvr32 /s %s
Reboot your system.

To help tailor the next steps, could you tell me when exactly this error pops up (e.g., during a specific app launch, or at Windows startup)? Sharing the exact error message text would also help pinpoint the issue.

📊 Diagnostics Tool: Verify Your `mofcomp.exe` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Other versions:
️ mofcomp.exe 10.0.19041.4474 32-bit (x86) | ️ mofcomp.exe 10.0.19041.4474 64-bit (x64)
Similar files:
️prvdmofcomp.dll | ️mofcomp.exe.mui