I have WSUS version 3 set up on a server. I have Group policy set for the Client workstations to Automatically download any approved updates and to Install any downloaded updates at 1AM. I have about 10 out of 180 PCs that downloads the updates, but will never install them. They will sit for days and never follow the 1AM Install time.
What settings on the client machines can I check because I doubt it anything is wrong with the WSUS or Group Policy settings since over 160 workstations are working correctly?