Whats the best hdd cleaner/eraser?

Mar 27, 2007
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ive noticed some disturbing problems with my OS and decided to format and reinstall my OS. after doing so i noticed the same problems!!!! Im not positive its a virus, it could possibly be hardware but its probably not. so, b4 i rma my new equipment, and even if I do, Id like a good hard disk drive cleaner. something I can use to completely erase all data on my hdd. I know windows os disks dont actually do that. so I want a program that is on a bootable cd that will totally wipe clean the whole hdd.

reccomendations please. thanx