How to Fix KB5017321 or KB5017026 Update Not Installing on Windows 11

Are the KB5017321 or KB5017026 updates not working, installed, or downloaded on Windows 11?

Windows released the updates on 09/20/2022 also known as 22H2 update.

The update includes smaller and faster installation of updates by about 450MB.

The download and installation time of the monthly cumulative update has also been reduced.

In addition, the update contains carbon awareness where Windows will schedule updates at specific times of the day,

A known issue in the update is the 0x800f0806 download error.

In this guide, you’ll learn how to fix the installation/download issue for the KB5017321 or KB5017026 update on Windows 11.

Fix 1: Run the Update Troubleshooter

1. Open the Windows start menu > Settings.
2. System > Troubleshoot > Other troubleshooters.
3. Windows Update > Run > Restart your PC.

Fix 2: Restart Windows Update and background intelligent transfer service

1. Windows search > Services.
2. Windows update > Startup type > Automatic > Apply > OK.
3. Select “Restart the service” for “Windows Update”.
4. Background intelligent transfer service > Startup type > Automatic > Apply > OK.
5. Select “Restart the service” for “Background intelligent transfer service”.
6. Restart your PC.

Fix 3: Use Windows 11 Installation Assistant

1. Go to https://www.microsoft.com/en-us/software-download/windows11.
2. Click on “Download Now”.
3. Run the .exe file > Accept and install.

Fix 4: Use Microsoft Update Catalog

1. Go to https://www.catalog.update.microsoft.com/Home.aspx.
2. Search for KB5017321 or KB5017026.
3. Download the Windows 11 KB5017321 or KB5017026 update(s).
4. Restart your PC.

Fix 5: Reset Windows Update components

Copy these and paste them into the Notepad app:

SC config trustedinstaller start=auto
net stop bits
net stop wuauserv
net stop msiserver
net stop cryptsvc
net stop appidsvc
Ren %Systemroot%SoftwareDistribution SoftwareDistribution.old
Ren %Systemroot%System32catroot2 catroot2.old
regsvr32.exe /s atl.dll
regsvr32.exe /s urlmon.dll
regsvr32.exe /s mshtml.dll
netsh winsock reset
netsh winsock reset proxy
rundll32.exe pnpclean.dll,RunDLL_PnpClean /DRIVERS /MAXCLEAN
dism /Online /Cleanup-image /ScanHealth
dism /Online /Cleanup-image /CheckHealth
dism /Online /Cleanup-image /RestoreHealth
dism /Online /Cleanup-image /StartComponentCleanup
Sfc /ScanNow
net start bits
net start wuauserv
net start msiserver
net start cryptsvc
net start appidsvc

Save the file as “Wufix.bat” > set the location as desktop > All Files > Save.

Run the file as an administrator to restart all the Windows update services and restart your PC.

Fix 6: Use the Media Creation Tool

1. Go to https://www.microsoft.com/en-us/software-download/windows11.
2. Click on “Download Now”.
3. Follow the on-screen instructions.
4. Open the downloaded file.
5. Run the setup file.
6. Follow the on-screen instructions and complete the installation process.

Further reading

How to Fix KB5017328 Update Not Installing on Windows 11

How to Fix KB5016691 Update Not Installing on Windows 11

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