Something that isn't clear to me-
if I install a retail upgrade version of Vista over a legitimate retail install of XP, in the offical, correct, manner, does the XP install get permanently disabled ? If so, this means that if I decide I don't want Vista on that machine anymore, I can't reinstall my retail XP ?
But if I use the tricky method of installing the retail Vista Upgrade, which to me seems quasi-legitimate as long as I stop using XP, then I'm actually better off because I can stop using Vista and go back to XP ?
If that's true, it doesn't make sense to me, so maybe it isn't true ?
also, if the version of XP I upgraded was an oem version that came with a prebuilt HP, would it make any difference ? Will upgrading to Vista make it impossible to go back to the XP version I paid for with the system ? And if I install a retail upgrade of Vista on an oem machine, can it even be removed and reinstalled on a different machine that has it's own XP, or has my retail Vista turned into an oem version ?
Some of these questions have been semi-answered, but in more than one way, so I'm still hoping for some clarity.