Check the windows event log, see if you have any drive errors. SQL doesn't corrupt its own files.
If the problem keeps reoccurring, I would suggest you move the DB only another machine
Corruption should always be fixed by restoring backups, not by running the repair options. They're a last resort and may cause data loss.
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