Error 0x8000ffff is a broad Windows failure code. In Windows Update and Microsoft Store, it is commonly caused by incorrect time settings, corrupted update/store cache, or security software interference.
This applies to Windows 10 and Windows 11 updates and Microsoft Store installs.
Does This Affect You?
Because the code is generic, work through the simple checks first. Correct clock settings and fresh cache folders fix many cases.
Check Date and Time
- Right-click the taskbar clock and choose Adjust date and time.
- Enable automatic time and automatic time zone.
- Confirm the displayed time zone is correct.
- Click Sync now if available.
- Restart and try again.
Reset Windows Update Components
- Open Command Prompt as administrator.
- Stop services with
net stop wuauserv,net stop bits, andnet stop cryptsvc. - Rename cache folders with
ren C:WindowsSoftwareDistribution SoftwareDistribution.oldandren C:WindowsSystem32catroot2 catroot2.old. - Restart services with
net start wuauserv,net start bits, andnet start cryptsvc. - Restart and check for updates again.
Reset Microsoft Store Cache
- Press Windows key + R.
- Run
wsreset.exe. - Wait for the Store to reopen.
- Try the Store install or update again.
- If needed, sign out of the Store and sign back in.
More Fixes
Check Security Software
Review third-party antivirus or firewall settings for blocked Windows Update or Store connections, then re-enable protection after testing.
Install the Update Manually
Find the KB number in Update history, download it from Microsoft Update Catalog, and install it directly.
Run Windows Update Troubleshooter
Open Settings > System > Troubleshoot > Other troubleshooters and run Windows Update.
Sources
- Microsoft Support: Fix Windows Update errors
- Microsoft Support: Reset the Microsoft Store cache
- Microsoft Support: Windows Update error codes explained
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