Solve Windows 11 KB5017321 update error code 0x800f0806

Windows 11 KB5017321 is a cumulative update for Windows 11 22H2 version, but some users reported that the installation failed and the error code 0x800f0806 appeared. This article provides several solutions to help you successfully install KB5017321.

Windows 11 2022 update (22H2 version) released

On September 20, 2022, Windows 11 released its first major update - Windows 11 2022 update (22H2 version). You can call it Windows 11 22H2 or Windows 11 Sun Valley 2. This update contains many new features and improvements. You can use the Windows 11 2022 Update Compatibility Checker to check if your computer can run Windows 11. If you can, check for updates in Windows Update in the Settings app and install it on your device when available.

If the Windows 11 2022 update is not installed or is not displayed in Windows Update, see the workaround here.

Windows 11 KB5017321 installation failed

On the day of the update release, Microsoft also released the cumulative update for Windows 11 22H2 version Windows 11 KB5017321, titled:

2022-09 Windows 11 version 22H2 x64 system cumulative update (KB5017321)

However, some users reported that Windows 11 KB5017321 could not be installed due to error code 0x800f0806.

This article will introduce the method to resolve the error code 0x800f0806.

How to fix Windows 11 KB5017321 error code 0x800f0806?

Method 1: Download Windows 11 KB5017321 offline installer

Windows update is not the only way to get Windows 11 KB5017321. You can also download the offline installer from Microsoft Update Catalog.

Step 1: Click here to download the .msu installer for Windows 11 22H2 version for x64 systems directly.

Step 2: Run the installer and follow the on-screen instructions to install Windows 11 KB5017321.

Step 3: Restart the computer.

Method 2: Run DISM

You can also run DISM to clear the error code.

Step 1: Click the search icon on the taskbar and search for "cmd".

Step 2: Right-click on the "Command Prompt" in the search results and select "Run as Administrator".

Step 3: Copy and paste the following command into the command prompt and press Enter to run.

dism /online /cleanup-image /startcomponentcleanup

Step 4: Wait for the process to end. Then restart the computer.

Step 5: Go to Windows Update to check for updates, try installing Windows 11 KB5017321 again, and check if the error code 0x800f0806 disappears.

Method 3: Wait

Microsoft should already know this problem. A fix is ??expected to be released later. Therefore, you can temporarily pause Windows updates. When the time is right, you can check for updates again.

Method 4: Newly install Windows 11 22H2 version

Another solution is to download the Windows 11 ISO file from the official Microsoft website and use it to perform a fresh installation of Windows 11 22H2. This may fix bugs in the system.

Conclusion

I encountered the error code 0x800f0806 when installing Windows 11 KB5017321? The methods described in this article can help you solve this problem. If you have other Windows 11 2022 update issues that need to be fixed, please let us know in the comments.

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