I hjave a SBS 2008 server and it wouuld shut down at random hours. I checked the event log, and all is says is "The previous system shutdown at 11:26:19 PM on 2/11/2011 was unexpected." with the various times in the log. I just got me a can of air and blew it out to see if maybe it was overheating from all the dust. There was a LOT of dust in there. Hopefully that fixed it. i will monitor today to see if it happens again. Any thoughts, ideas of possible things to check? I really don't want to have my client starting buying things like memory modules just to have that not be the problem. Maybe someone can recommend a software (free or trial if possible) that I can run to test all the hardware so I can rule that out.