How to Fix Fix Error 0x80070494 — Group Policy Service Failure on Windows
Getting error 0x80070494 when applying Group Policy? Windows Update failing with this code? Group Policy client service not starting? Fix this Group Policy processing error.
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Main Troubleshooting Guide
How to Fix Windows Update Errors →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Windows Update fails with error 0x80070494
- •Group Policy application fails at startup
- •Event Viewer shows Group Policy errors with this code
- •gpedit.msc changes not applying
- •Domain-joined PCs not receiving policy updates
- •Local Security Policy changes rejected
Common Causes
- ⚠Group Policy client service corrupted or not running
- ⚠Registry permissions preventing policy application
- ⚠Windows Update components referencing Group Policy incorrectly
- ⚠Corrupted Group Policy cache files
- ⚠SID mapping issues after domain migration
- ⚠System file corruption affecting policy engine
Solutions
Solution 1: Reset Group Policy Cache
- 1Clear cached Group Policy files:
- 2CMD as Admin:
- 3RD /S /Q "%WinDir%\System32\GroupPolicyUsers"
- 4RD /S /Q "%WinDir%\System32\GroupPolicy"
- 5gpupdate /force
- 6This forces Windows to rebuild Group Policy from scratch
- 7If domain-joined: policies will re-download from domain controller
- 8If standalone: local policies reset to defaults
- 9Restart PC after gpupdate completes
Solution 2: Fix Group Policy Service
- 1Ensure the Group Policy Client service is running:
- 2services.msc → "Group Policy Client"
- 3Start type should be: Automatic
- 4If service won't start: fix registry permissions:
- 5Registry Editor → HKLM\SYSTEM\CurrentControlSet\Services\gpsvc
- 6Right-click gpsvc → Permissions
- 7Ensure SYSTEM has Full Control
- 8Also check: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Svchost
- 9The "GPSvcGroup" value should exist under netsvcs
- 10sfc /scannow to repair corrupted service files
Solution 3: Fix Windows Update with This Error
- 1If this error appears during Windows Update:
- 2The update may require Group Policy processing to complete
- 3Reset Windows Update components:
- 4CMD as Admin:
- 5net stop wuauserv
- 6net stop bits
- 7ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
- 8net start wuauserv
- 9net start bits
- 10Then reset Group Policy: gpupdate /force
- 11Retry Windows Update
- 12DISM /Online /Cleanup-Image /RestoreHealth if still failing
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