Last week, in the middle of the day, (around noon), my bitcoin core client stopped working and threw this error:

EXCEPTION: 13leveldb_error
Database Corrupted
C:\Program Files\Bitcoin\bitcoin-qt.exe in Runaway exception

I did a bunch of research.  Finally, I ran the program with -reindex and after MANY hours, the problem was resolved.

Now, today, this issue happened again.  What could be causing this?  I don't mind re-indexing again, but not once a week.
I might as well download the whole block chain from scratch for as long as it took. (Maybe re-indexing does?)

I'm running the most recent version of the software.

Thanks!