Our SBS 2008 started freezing on start up and what happens is that when you start up and login, everything freezes but clients can access files and only exchange does not work, everything else does. The server is very slow but after an hour or two unfreezes and things are back to normal. I only have to restart Exchange info store and it works. At first I was thinking that this had something to do with an array we have of SATA drives but it does not. Very unusual. Why would SBS 2008 freeze in that way and still function but the user interface being frozen. Any suggestions? The SBS is installed on 4 months old DL 380, 20 GB ram, SAS drives, enough space, all drives checked work ok, no warning on hardware. Any suggestions would be greatly appreciated as the server became almost useless.