How to Fix Fix Error 0x80070BC9 — Windows Update Policy Conflict on Windows
Getting error 0x80070BC9 during Windows Update? "ERROR_FAIL_NOACTION_REBOOT" or update fails due to policy conflict? Fix this update installation 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 0x80070BC9
- •Update installs but requires reboot that doesn't resolve it
- •"Failed to install" repeatedly with this error code
- •Multiple updates queued but none install successfully
- •Error appears after joining a domain or applying Group Policy
- •Defender definition updates fail with 0x80070BC9
Common Causes
- ⚠Group Policy or MDM policy conflicting with update settings
- ⚠Pending reboot not clearing update installation state
- ⚠Windows Update registry policies misconfigured
- ⚠WSUS (Windows Server Update Services) policy conflict
- ⚠Multiple update management tools conflicting (SCCM, Intune, WSUS)
- ⚠Corrupted Windows Update policy cache
Solutions
Solution 1: Clear Update Policy Conflicts
- 1CMD as Admin:
- 2net stop wuauserv
- 3Check for WSUS policy: Regedit →
- 4HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
- 5If "WUServer" or "WUStatusServer" exist and you're not using WSUS:
- 6Delete the entire WindowsUpdate key under Policies
- 7net start wuauserv
- 8Settings → Windows Update → Check for updates
Solution 2: Force Pending Reboot Resolution
- 1Check for pending reboot flags:
- 2Regedit → HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired
- 3If this key exists: restart your PC
- 4If restart doesn't clear it: delete the "RebootRequired" key
- 5Also check: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending
- 6Delete "RebootPending" key if present
- 7Restart PC → retry Windows Update
Solution 3: Reset Windows Update Components
- 1CMD as Admin:
- 2net stop wuauserv
- 3net stop bits
- 4net stop cryptSvc
- 5ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
- 6ren C:\Windows\System32\catroot2 catroot2.old
- 7net start cryptSvc
- 8net start bits
- 9net start wuauserv
- 10gpupdate /force
- 11Settings → Windows Update → Check for updates
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