Normal vs. Secure file deletion

CCleaner for Windows
1

I'm looking for information about what each method does. Any help out there?

2
I'm looking for information about what each method does. Any help out there?

Hi montevarius 1%20(46).gif The Beginner's Guide for CCleaner has lots of useful info.

Secure Deletion (Changing the option here will allow for secure file deletion)

?Normal file deletion (Faster) - Default

?Simple Overwrite (1 pass)

?DOD 5220.22-M (3 passes)

?NSA (7 passes)

?Gutmann (35 passes)