I was just thinking this morning, with Service Pack 2 of Windows XP just being released, how much of a hassle it would be to reinstall everything. And how risky.
For instance, let's say your PC is acting strange, and there is no way to fix it. So you decide to reformat your hard drive, and install every piece of software on there from scratch. Sometimes, that's the best way to get things working again.
Well, you install Windows XP off your original CD, and connect to the internet to download the latest patches. Well, within seconds your PC is infected with a worm, and it constantly reboots itself.
What every Windows XP user should do is follow THESE INSTRUCTIONS to create themselves a new Windows XP Installation CD. So when you decide to repave, you'll have SP2 already installed - no worms are getting in.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.