Here’s a link to a .reg file to delete the key.
Usual disclaimer: Use at your own risk. Backup your registry before making any changes.
WSUS settings can be found at HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
You can delete the WindowsUpdate key. It will be recreated if it’s needed.
Tip: You can copy and paste into the address bar in registry editor.
Restart Windows Update service (wuauserv) after making changes.
powershell
restart-service wuauserv
cmd
net stop wuauserv && net stop wuauserv
Check for updates after restarting the service.
control update