I have the basic Bit Defender on several Windows computers.  I see the "File Shredder" and understand what it does.
	My question is: Is there a way to shred all unused space on a disc? I used to use CC Cleaner for this and will go back to that if Bitdefender can't do it.
	I see an "Upgrade" for my version of Bitdefender that includes more utilities - any idea if one of these will do what I want?