Marginnayan, I use Fixit Utilities for my registry cleaner. As for a firewall, I am on Road Runner cable and they don't support firewalls. If you are worried about someone taking over your computer just disable file sharing in your network settings. I also use PC Pitstop for internet system tests. <A HREF="http://www.pcpitstop.com/" target="_new">http://www.pcpitstop.com/</A> BT