First Windows threw me. My first ever store-bought copy of Windows was XP. I shelled out $200 to get it, because Windows Millenium sucked so badly. Then I got home and installed XP on my wife's computer. When I tried to install it on mine, it informed me that the key had already been used once, and was now invalid. My $200 didn't buy me any software, it only bought me a license. A license for a single computer. I was furious. XP informed me I could continue to use it for 30 days before I would need...