Actually, I do have a lot of Windows experience. My first Windows was the 3.11(!).After that, as time came by, I moved on to 95. Then I switched to 98 , later on to ME. Now I've been going on XP for about 3-4 years with no service packs or anything(At least on my computer, they just slowed things down a lot and made windows a lot heavier.) But I was just completely ignorant of x64, so better be safe now than sorry later.