Simon Gerber from Mad Penguin talks about how he switched from Linux to Microsoft Windows. And it wasn't as easy as you think, he writes:
At this point, the idea occurred to me that maybe my computer was broken. Luckily, we had plenty of spare parts around the office. Briefly, I considered transplanting my hard drive into one of the spare machines. Then I noticed the Windows XP OEM license key stuck to the side of a nearly empty chassis, and had a better idea! "Oh ho!" I thought to myself, "Why not use this opportunity to try a fresh install of this 'Windows XP' I keep hearing so much about." So I grabbed an all-in-one Intel board, and a spare 200GB IDE hard-drive we had kicking around, then rooted through the cookie jar for some RAM chips that I jammed into slots until I heard clicks. Then I rooted through the trash pile until I found a Windows XP OEM CD, and we were all set for this grand electronic experiment!