This is for geeks only, but if you’re one of those people who gets calls from friends/family/acquaintances/the guy who puts your groceries in the bag asking for help with their computer, you’ll find the Ultimate Boot CD pretty handy. It’s a bootable CD that contains a host of useful diagnostic and maintenance tools for computers. Next time you go out on a service call, bring along this cd. Free, mostly useful to windows/x86 hardware folk.