Well, here is the time to activate windows. When I got my copy of Vista Ultimate, I had already activated my 32-bit version. SInce I went 64-bit for good last month, windows informed me I need to activate my copy (Full retail version) it says that this serial number is already activated and I would need to purchase another!! I thought since one was 32 and one was 64 bit, that microsoft would know better on the same hardware. They could clearly see that this version is going on the exact same machine. Anyone have any suggestions on how to get around this?