How can I erase e files off my hard drive ? Can I do it with out a file shredder?

Answer 1

You have to perform a "secure delete" to remove information permanently. This is the only real way to erase information off of magnetic media. This works by encrypting the data and deleting it many times over until its nothing more than unreadable code. Shredding is another technique but not nearly as effective. Also. The US Dept of Defense endorse "secure delete" as the only way to permanently remove data. Check the link below for the step by step.
http://www.delete-computer-history.com/secure-file-deletion.html

Answer 2

Without a good file shredder, the deleted files could be easily recovered even if you do a disk format.

You could do a low-level format with a utilty from the hard drive manufacturer that will 'zero' the drive.But that of course will wipe off everything so you have to do a backup first.

Answer 3

Right click on the file and choose delete.