Can I make the System Reserved partition bigger?

Microsoft says you might fix 0x800F0922 by using third-party software to increase the size of the System Reserved partition. Back up your personal files before you try that or any other fix.

Where do I find the error code for a failed update?

In Windows 11, select Start > Settings > Windows Update > Update history. Look for the update that wasn't installed and note its error code.

Does Windows 10 still get updates?

Support for Windows 10 ended on October 14, 2025. After that date, Windows 10 gets no free software updates from Windows Update, technical assistance or security fixes.

Fix Windows Update error 0x800f0922 in Windows 11 and Windows 10

Windows Update error 0x800f0922 means the PC couldn't connect to the Windows Update servers, or there isn't enough free space in the System Reserved partition¹. Microsoft also links it to low disk space². Turn off any VPN and free up at least 16 GB on a 32-bit OS or 20 GB on a 64-bit OS². Then run the Windows Update troubleshooter and check for updates again³.

What the error means

Microsoft gives two causes for 0x800F0922. The PC might not have been able to connect to the Windows Update servers. Or there isn't enough free space in the System Reserved partition¹.

Microsoft's update troubleshooting page lists the same code as "Unable to install due to insufficient disk space or issues with the .NET Framework or other components"². On Windows Server 2016, the code appears as CBS_E_INSTALLERS_FAILED. Microsoft saw it when a July cumulative update failed to install⁴.

Before you start

Back up your personal files before you try any fix, as Microsoft advises². You can copy them to a USB drive with File Explorer².
Some updates need administrator access. If your account doesn't have it, ask someone with an administrator account to install the updates².
Plug the device into a power source and keep it connected to the internet².
The repair commands in fix 6 need Command Prompt opened with Run as administrator².

Fixes

Turn off your VPN. If you use a VPN to connect to a work network, disconnect from the network and turn off the VPN software. Then try the update again^1,2.
Check your internet connection. Select Start > Settings > Network & Internet > Wi-Fi². If you're disconnected, reconnect to your Wi-Fi or Ethernet network².
Run the Windows Update troubleshooter. In Windows 11, select Start > Settings > System > Troubleshoot > Other troubleshooters. Under Most frequent, select Run next to Windows Update³. In Windows 10, select Start > Settings > Update & Security > Troubleshoot > Additional troubleshooters. Under Get up and running, select Windows Update > Run the troubleshooter³. Restart your device when it finishes, then select Check for updates in Windows Update settings³.
Free up disk space. Your device needs at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS². If it has a small hard drive, you may need to insert a USB drive to update it².
Clear the Windows Update cache. Corrupt update files in the cache can cause errors². Press Win + R, type services.msc and press Enter. Right-click the Windows Update service and select Stop². Go to C:\Windows\SoftwareDistribution and delete all files and folders inside it. Then right-click Windows Update in Services and select Start².
Repair system files. In the search box on the taskbar, type command prompt, then select Run as administrator². Run these commands one at a time, and press Enter after each²:
Command Prompt
```
DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
```
DISM confirms with "The restore operation completed successfully" or "The operation completed successfully"². Wait until the sfc scan reaches 100%, close Command Prompt and run Windows Update again².
Temporarily remove third-party security software. Third-party antivirus or security software can cause errors when you update². Uninstall it, update your PC, then reinstall it². Before you uninstall, make sure you know how to reinstall it and have any product keys².

If nothing works

The second cause, a full System Reserved partition, needs a different fix. Microsoft says you might fix it by using third-party software to increase the size of that partition¹. Back up your files before you change any partition².

To report the problem, find the failed update in Start > Settings > Windows Update > Update history¹. Note its error code, then contact Microsoft support¹.

On Windows Server 2016, updates can roll back when License and Product key tokens fail to update⁴. Microsoft's fix is to add write permissions for the "User" and "Network Service" accounts to the C:\Windows\System32\spp\ folder⁴.

Questions

Can I make the System Reserved partition bigger?: Microsoft says you might fix 0x800F0922 by using third-party software to increase the size of the System Reserved partition¹. Back up your personal files before you try that or any other fix².
Where do I find the error code for a failed update?: In Windows 11, select Start > Settings > Windows Update > Update history¹. Look for the update that wasn't installed and note its error code¹.
Does Windows 10 still get updates?: Support for Windows 10 ended on October 14, 2025³. After that date, Windows 10 gets no free software updates from Windows Update, technical assistance or security fixes³.

4 Sept 2026: Published.