Possible Duplicates:
How to secure delete file or folder in windows?
Erasing data before selling a computer
I have a hard disk with some confidential data that I'm obliged to destroy. I've tried sweeping free hard disk spaace with CCleaner several times, but EasyRecovery can still read data without any problem.
Is there any way to securely wipe the data from hard disk (even the data that's already been overwritten by other files)?