When you dump a file from your Recycle Bin, it's not really gone for good. You need a special program to get rid of it. Blank and Secure does the job very efficiently. You can tweak the settings to find the perfect mix of security and speed for you.
The program lets you pick any file on your hard drive and drag and drop it right into the queue for deletion. You can also wipe blank space on your hard drive, eliminating the chance of someone reviving a deleted file. The program fills the deleted file with junk to make it impossible to restore. You can choose any number of "passovers" from one to 35. Thirty-five is the military standard, which means it's extra secure. It also means it takes forever. Blank and Secure's uninspired layout is full of typos and misspellings, but it is offered in more than a dozen different languages.
If you're really security-conscious, this download will delight you. It's a powerful, customizable deletion program that will keep your sensitive data secure. Make sure you run Blank and Secure before you pass your computer off or sell it to someone you don't know.
From Nenad Hrg:
Blank And Secure is a portable tool to securely delete the data. Secure delete files are required to block the recovering of deleted data. Secure deletion is possible with this program, because "Blank And Secure" overwrites the data with zeros before deleting. The data recovery is impossible after this operation. So please only use if the data really should be permanently deleted.