For people who dont want to click on the link the basics are:
Microsoft wanted to have a go at the Mac so copied there advert where Mac had people saying why they moved from the PC to the Mac but Microsoft couldnt find anyone who liked WinXP (Actually thats not what they said but I bet its true) so hired a freelance writer and uploaded it (After paying her) with a library picture of a woman.
People found out that it was all false and Microsoft removed it from there web site.