How to fix Windows 11 update stuck at 0%, 61%, 99%, 100%

• Turn off Windows Update and Background Intelligent Transfer Service
• Open the Start menu search, type “cmd”, and then select the “Run as administrator” option to launch an elevated Command Prompt.
• Execute the command net stop wuauserv and net stop bits in order.
• Close Command prompt
• Delete the update files in the SoftwareDistribution folder
• Navigate to C:\Windows\SoftwareDistribution and select all the files and folders there.
• Right-click on the selected items and select Delete. If you fail to delete them, restart your computer and try again.
• Turn on the services again
• Launch Command Prompt in Admin mode. 
• Run the command net start wuauserv and net start bits one by one.
• Exit Command Prompt.