check if you are using wsus
First you need to check if the computer is updating via the wsus server.
Run Powershell as Administrator and run these commands :
$MUSM = New-Object -ComObject "Microsoft.Update.ServiceManager". $MUSM.Services.
Check the output : if you are reading Windows Server Update Service
it’s the signal that source of updates is a wsus server.
Remove wsus from computer client
Sarch for the folder
Delete the entire folder WindowsUpdate.
restart windows update service.
You can repeat the test of the first part to check if wsus has been removed from the client.