I have a program that when I empty the recycle bin, it also wipes the allocated space to delete the files totally from the hard cleans the hard disk and gives me space. Space that I need. I get a lot of emails that are large. I don't know if deleting them with "yahoo" opens up space. But using this program with items in the recycle bin will. I have Windows 7 on one computer and windows xp on the other. I need to clean up both computers the best I can so there is space for me to install other items that are rather large sized. Please help. Thank you.