Required Tools for PC Repair?

kennethrona asks: "I seem to be spending a lot of my time installing friends' WiFi access points, replacing power supplies, hard disks, blocking ports, installing software, etc. I can usually find any of the software I need on-line, but am thinking about putting together a "toolkit" for PC repair. What tools, both hardware and software, does the community think are essential for PC repair? Bonus points for free software (I always install a free firewall and spyware checker). Also, keep in mind that most folks are running Windows."

Comments

Windows re-configures without notice.

[Futurepower(R)]

That's one of the things I dislike most about Microsoft Windows. It will re-configure itself with no message to the user whatsoever.