DC, Server 2003, Exchange 2003, BackupExec, Sophos, Nothing newly installed... maybe MS updates a couple weeks ago. Certain NO Malware NO virues. These shutdowns started Thu 3/08 out of the blue and continues. The last one was today around 2:03 PM. Dell has a GUI Online Diagnostics that DOES NOT check power supply. Pretty much the results are OK. No event logs except "unexpected shutdown" and the routine startups that follow 15 minutes later.
Does anyone think this is more than a power suppy issue... and is there a way to know for certain?