At first the server started to run very slowly for everyone until it came to a halt. Now, when logging in we just have a blank desktop. Looking at the processes running, I find userinit.exe using 25% CPU and idle is using 75%.
I have powered down the server completely and started back up in safe mode. I get the same thing when logging in with a local account in safe mode.
Thanks for any help. I have a bunch of users unable to work.