Windows Update install/cleanup failed (component store / connectivity / disk)

in plain english

Windows Update couldn't complete a component-store install or cleanup. Most common causes are component-store corruption, .NET payload failures, low disk space, or connectivity blocking access to the update servers. (Note: KB5034441's notorious WinRE-too-small failure surfaces as 0x80070643, not 0x800F0922.)

most likely causes

• Component store (WinSxS) is corrupted
• Free disk space too low on system drive
• Network blocking access to WSUS / Microsoft Update during install
• .NET Framework install failed inside the update payload
• System reserved partition is full or has no free space for staging

fix path

1. Run DISM repairs: DISM /Online /Cleanup-Image /RestoreHealth then sfc /scannow
2. Check disk space: at least 20GB free on C: for feature updates, 5GB for security updates
3. Review the CBS log at C:\Windows\Logs\CBS\CBS.log around the failure timestamp for the actual blocking error
4. Confirm the device can reach Microsoft Update endpoints (or your WSUS) — proxy/firewall changes are a frequent cause
5. If repeated on a single device: try Microsoft's Show or hide updates troubleshooter, or skip the update via WSUS/Intune for that ring
6. If you're chasing a WinRE partition issue (KB5034441 era), look up 0x80070643 — that's the matching error code

seen in

Windows Update · WSUS deployments · Intune Update Rings · Feature update installs

related

• errno KB5034441