A couple of days ago one of our web-servers went down in the small hours. It wasn't responding to any remote requests (to be honest I don't know if it would have responded if a USB keyboard and monitor were plugged into it) and an engineer at the data-center rebooted the server for us.
Everything came back up ok, and I then checked the event logs to see if there were any clues as to what went wrong. All I can really see is the event "the previous shutdown at 1AM was unexpected" (which is the time the server went down, not the time the engineer hit the power button).
The server has IIS - but obviously the website logs just shows the file requests leading up to the crash (or freeze) and there's no increase in the volume of traffic prior to the crash. SQL Server is also installed, but the logs just report that a dozen or so transactions were rolled forward when the server came back up.
Is there anything else I can look at to find a possible cause for the crash?