[Dan Nunn]

A full version of Windows XP Home Edition is $199 if you do not have Windows installed already. This is only relevant if you are building your own PC or something like that (or if you don't have a spare Windows 98 disc around your house). For everyone who already has Windows, the upgrade copy (which can also do a full-format, don't be fooled) is only $99. And honestly, for all Windows XP gives you, $99 is not a bad price at all. I pay half of that for games that I may only play for a couple of months. You'll use XP every day for years.

[SolitaryMan]

I shelled out $200 to upgrade two home computers. But the way they have been running, it was worth the price.