Wipe disk then Restore?

Hello, I have to return a computer for a replacement due to a problem. What I would like to do is wipe the C partition and overwrite it with 1's using Partition Wizard boot CD. Then restore to the original configuration thru the computers system recovery or from the disks they are sending me.



Will this work? If not is there another way?

Disk Management Pic.



Its not like I have CIA files on the computer but you never know what will become of the HD after I return it.

Thanks

Yes, it will work from the Recovery DVD's.

You can also use the clean all command by using diskpart in an elevated command prompt.

Disk - Clean and Clean All with Diskpart Command