We have two servers that are identical, one we use for production, one for beta testing. We have swapped hard drives back and forth between the two of them, sometimes as a pair, sometimes as singles breaking the mirror and letting it recreate the image on the other machine. This has worked no problems. However, the last time I did it, it imaged fine, I unplugged the network cable, disjoined it from the domain offline, rebooted, changed the name of the computer rebooted, plugged in the network cable. I forgot to clear the IP address so there was an IP conflict (whoops - my bad). Easily fixed though. Rebooted again and joined the domain with our admin credentials, rebooted. I then logged into the computer with those same credentials using Remote Desktop (I didn't want to be in that room any longer than I had to) and it froze. I went back into the server room, and the keyboard was frozen too (No C-A-D), but the mouse was still working. I reset the computer, same problem when I tried to login locally. Tried another domain account and it worked fine. Disjoined from the domain and rejoined. Same problem. Cleared the user profile out. Same problem. So I'm thinking there is a registry setting it's not clearing but I'm not sure. Is there any way of knowing what each of the S- numbers that are in the user profile in the registry are referring to? Or any other ideas?