Well, let me clarify a bit. Those machines are currently running Win7 RC without issue. One is 64bit capable and the other is not, so specs is not an issue. XP Pro and Vista HP are what they used to run before I installed Win7. I figure I will re-install vista and xp (unless just the install disk is needed for verification) prior to clean install of win7. I will also probably purchase a full version for my new rig i should have put together by october or november