Windows 7 Hard disk corrupted

Many months ago, I quit using Defraggler because it corrupted my New Windows 7 Pro 64 bit computer drive.

Has there been any up grades to prevent this?

I'm afraid to try it again !

I did like its speed and options and would like to try using it again ! :unsure:

A new version of Defraggler came out yesterday, (this is the third new version since last September)

http://forum.piriform.com/index.php?showtopic=34990