cinden,
What are some of these files that you cannot delete?
Make sure that you have all of your programs closed out before removing files or folders that you want to remove or
have no use for.
You may also want to consider going into Add/Remove Programs and look at at programs that you no longer use and remove it from the machine. Also look into the Program files folder itself and if the program file folder hasn't been deleted,
manually try to delete the folder.
Hope this helps,
Lori MS