--- title: "Fix Windows Update error 0x800f0922 in Windows 11 and Windows 10" canonical: https://saasranked.com/guides/windows-update-0x800f0922/ applies_to: Windows 11, Windows 10 checked: 2026-09-04 (against Microsoft's documentation) updated: 2026-09-04 --- # Fix Windows Update error 0x800f0922 in Windows 11 and Windows 10 Error: `0x800f0922` - Microsoft gives two causes for 0x800F0922: no connection to the Windows Update servers, or too little free space in the System Reserved partition [1]. - If you use a VPN to reach a work network, disconnect from it, turn off the VPN software and try again [1][2]. - Your device needs at least 16 GB of free space to upgrade a 32-bit OS, or 20 GB for a 64-bit OS [2]. - In Windows 11, the Windows Update troubleshooter is under Start > Settings > System > Troubleshoot > Other troubleshooters [3]. - On Windows Server 2016, Microsoft logged 0x800f0922 as CBS_E_INSTALLERS_FAILED when a July cumulative update failed to install [4]. 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 partition [1]. Microsoft also links it to low disk space [2]. Turn off any VPN and free up at least 16 GB on a 32-bit OS or 20 GB on a 64-bit OS [2]. Then run the Windows Update troubleshooter and check for updates again [3]. ## 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 partition [1]. 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 install [4]. ## Before you start - Back up your personal files before you try any fix, as Microsoft advises [2]. You can copy them to a USB drive with File Explorer [2]. - Some updates need administrator access. If your account doesn't have it, ask someone with an administrator account to install the updates [2]. - Plug the device into a power source and keep it connected to the internet [2]. - The repair commands in fix 6 need Command Prompt opened with **Run as administrator** [2]. ## Fixes 1. **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]. 2. **Check your internet connection.** Select **Start** > **Settings** > **Network & Internet** > **Wi-Fi** [2]. If you're disconnected, reconnect to your Wi-Fi or Ethernet network [2]. 3. **Run the Windows Update troubleshooter.** In Windows 11, select **Start** > **Settings** > **System** > **Troubleshoot** > **Other troubleshooters**. Under **Most frequent**, select **Run** next to **Windows Update** [3]. In Windows 10, select **Start** > **Settings** > **Update & Security** > **Troubleshoot** > **Additional troubleshooters**. Under **Get up and running**, select **Windows Update** > **Run the troubleshooter** [3]. Restart your device when it finishes, then select **Check for updates** in **Windows Update** settings [3]. 4. **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 OS [2]. If it has a small hard drive, you may need to insert a USB drive to update it [2]. 5. **Clear the Windows Update cache.** Corrupt update files in the cache can cause errors [2]. Press **Win** + **R**, type services.msc and press Enter. Right-click the **Windows Update** service and select **Stop** [2]. Go to C:\Windows\SoftwareDistribution and delete all files and folders inside it. Then right-click **Windows Update** in Services and select **Start** [2]. 6. **Repair system files.** In the search box on the taskbar, type command prompt, then select **Run as administrator** [2]. Run these commands one at a time, and press Enter after each [2]: ```cmd 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 again [2]. 7. **Temporarily remove third-party security software.** Third-party antivirus or security software can cause errors when you update [2]. Uninstall it, update your PC, then reinstall it [2]. Before you uninstall, make sure you know how to reinstall it and have any product keys [2]. ## 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 partition [1]. Back up your files before you change any partition [2]. To report the problem, find the failed update in **Start** > **Settings** > **Windows Update** > **Update history** [1]. Note its error code, then contact Microsoft support [1]. On Windows Server 2016, updates can roll back when License and Product key tokens fail to update [4]. Microsoft's fix is to add write permissions for the "User" and "Network Service" accounts to the C:\Windows\System32\spp\ folder [4]. ## 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 partition [1]. Back up your personal files before you try that or any other fix [2]. **Where do I find the error code for a failed update?** In Windows 11, select Start > Settings > Windows Update > Update history [1]. Look for the update that wasn't installed and note its error code [1]. **Does Windows 10 still get updates?** Support for Windows 10 ended on October 14, 2025 [3]. After that date, Windows 10 gets no free software updates from Windows Update, technical assistance or security fixes [3]. ## Sources 1. [Get help with Windows upgrade and installation errors](https://support.microsoft.com/en-us/windows/get-help-with-windows-upgrade-and-installation-errors-ea144c24-513d-a60e-40df-31ff78b3158a), Microsoft Support, accessed 2026-09-04 2. [Troubleshoot problems updating Windows](https://support.microsoft.com/en-us/windows/troubleshoot-problems-updating-windows-188c2b0f-10a7-d72f-65b8-32d177eb136c), Microsoft Support, accessed 2026-09-04 3. [Windows Update Troubleshooter](https://support.microsoft.com/en-us/windows/windows-update-troubleshooter-19bc41ca-ad72-ae67-af3c-89ce169755dd), Microsoft Support, accessed 2026-09-04 4. [Common Windows Update errors](https://learn.microsoft.com/en-us/troubleshoot/windows-client/installing-updates-features-roles/common-windows-update-errors), Microsoft Learn, accessed 2026-09-04 Checked against Microsoft's documentation on 4 Sept 2026.