mpssvc.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: Meta Description: dll errors, ensuring Microsoft Protection Service runs smoothly. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
File version	10.0.19041.6328
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	0.9 Mb.	914944 bytes.

Hashes:

MD5: cc4ea988d85ba6f1aa0abfafece21ea9 ✅
SHA-1: afec26d4a7a2d81d9da21f06a6a23d34106f813e
SHA-256: e92e1f672f624b86d9ec22abdf2df44fd8de23e1d75027f179a446f68d972548
SHA-512: 7f0738660ae5791bc8bb3690a394b6ce4808353ba77f79ae551f2bb06cd9a7e7d572635ad7a4188f218ab4bb675450979552c833f9830f03fff7e22feb73da37

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

How to Fix mpssvc.dll Errors Without Downloading Files

The mpssvc.dll file is a critical Windows component for the Windows Defender Firewall. If it is missing or corrupted, you should never download it from third-party websites, as these files often contain malware. Instead, fix it using built-in Windows tools.

Step 1: Run SFC and DISM Repairs

Windows has built-in tools to automatically find and replace missing system files.

Press the Windows Key.
Type cmd.
Right-click Command Prompt.
Select Run as administrator.
Type sfc /scannow and press Enter.
Wait for the scan to finish.
Type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
Restart your computer.

Step 2: Restart the Windows Firewall Service

If the file is present but failing, restarting the service can resolve the error.

Press Win + R to open the Run dialog.
Type services.msc and press Enter.
Scroll down to find Windows Defender Firewall.
Right-click it and select Restart (if grayed out, select Start).
Ensure the Startup type is set to Automatic.

Step 3: Run Windows Update

Updating Windows will automatically replace outdated or broken system DLLs.

Press Win + I to open Settings.
Click on Update & Security (or Windows Update).
Click the Check for updates button.
Install all pending updates and restart your PC.

Step 4: Perform a System Restore

If the error started recently, you can roll back your system to a time when it worked.

Press the Windows Key.
Type Create a restore point and click it.
Click the System Restore button.
Choose a date before the error started appearing.
Follow the on-screen prompts to finish.

📊 Diagnostics Tool: Verify Your `mpssvc.dll` 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.