crazzzymolly: Thanks pocket yea maybe the guy is okay, but , may try myself would hate to delete something that's going to stuff my computer up. Though
If you have all the installation disc for your pc as long as you back up all your docs and settings onto DVD CD or removable drive even if you delete something that will foul up your pc you just do a reinstall and restore all your settings.
If you have windows xp or vista it's even easier as it will backup all your files for you by using the file transfer wizard and putting them onto a DVD then restoring them after you reload your software.
Back when I was in the computer game the first thing I used to do with customers who were shit scared of "messing it up" was to show them how to backup their data, wipe their computer and set it up again. That way they were less paranoid about "breaking it". Plus then anti-virus software wasn't as good and they used to get infected all the time.
Best of luck and let me how you get on.