Q: I have 14.5 GB left out of 33.1 GB. Is there any way to do a complete clean, to get rid of files and things I don't use any more to get more space?
A: try defraging it it and uninstalling unused programs here http://weblogs.asp.net/jgalloway/archive/2006/12/17/freeing-up-drive-space-on-windows-xp.aspx