Fix Windows Update 20H2 Failed to Install:
Microsoft has releases feature updates to Windows 10 version 20H2 to end-users. All compatible devices get a notification to download Windows 10 version 20H2. And when you are ready and hit the download button Windows 10 20H2 update download and install on your device. That means you have more control over windows 10 feature updates. But unfortunately, some users are experiencing issues where feature update to Windows 10 version 20H2 failed to install Apart from this, the windows 10 20H2 update stuck for some users.
If you are also struggling with the Similar problem, Windows 10 20H2 update stuck downloading or failed with a different error here how to fix and get Windows 10 October 2020 update the right way.
Run Windows Update troubleshooter
Run the built-in Windows update troubleshooter following the steps below. That automatically detects and fixes the problems prevent windows 20H2 updates to install.
1. Press Windows + I keyboard shortcut to open the settings app,
Click Update & security then Troubleshoot,
2. Then select Windows Update and click Run the troubleshooter
3. This will start the diagnose process, check Windows Update and its related services running,
4. Check the software distribution folder for any buggy updates prevent windows updates to install.
5. Restart Windows after complete the troubleshooting process,
6. Again check for updates and hit the download button to install the windows 10 October 2020 update,
7. Restart windows to apply changes and use Winver command to check the Windows version and build number.
Windows 10 20H2 update stuck at 0% or 95%
If Windows 10 version 20H2 download or install stuck at 0% or 95% this is because Windows update components corrupted. And Reset Windows update components a good solution that fixes most of Windows 10 update problems.
Follow the steps below to reset Windows update components
1. Press Windows + R, type services.msc and ok
2. This will open the Windows services console,
3. Scroll down look for Windows update service,
4. Right-click on Windows update service select restart,
5. Now Press Keyboard shortcut Windows + E to open file explorer
6. Then Go to C:\Windows\SoftwareDistribution\Download
7. Here delete everything within the folder, but do not delete the folder itself.
To do so, press CTRL + A to select everything and then press Delete to remove the files.
Don’t worry about these files, Windows update download fresh update files from Microsoft server on next time you check for updates.

Again open the Windows services console and start the Services
To do this right-click on Windows Update service and select start
Well restart windows and again check for updates,
Hit the download button, to install Windows 10 October 2020 update.
If you still have a problem installing Windows 10 version 20H2 Run DISMrestorehealth command following the steps below. That prepare Windows image and fix any issue with your Windows 10 installations.
Open the command prompt as administrator,
Type command DISM /Online /Cleanup-Image /RestoreHealth and press the enter key.
Let the process complete 100%
After that run command sfc /scannow to run system file checker utility that detects and restore missing system files with correct one.
Restart Windows after 100% complete the scanning process.
Now check for and install Windows 10 version 20H2 without any problem.