Not event viewer. The SQL Server error log. (Those log entries are in the application event log too, often harder to find among all events from all the other apps)
It's a text file on disk (location depends where you installed SQL), latest one is simply called ERRORLOG
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability