I also used to fix many Windoz machines. You always had to tell people
without your CDs, serial numbers, and driver discs, I can't help you (fully).
It was kind of fun though, wiping out 20 viruses with a FORMAT. Unfortunately, most people don't understand that a PC with Windoz rarely is healthy longer than a year. Fresh installs are a good thing. Many hours and drivers later... not such a good thing. You will slowly realize that a lot of stuff in linux is way more convenient.
If you are used to the Windoz look, I strongly recommend Linux-Mint-14-KDE. KDE is the most similar to Windows thing out there.