Q: I have a PC with dual processors (Not Dual Core), Twin Intel Xenon processors. In the motherboard setup both processors show up but in Vista Home Premium I can only see 1. Does Vista Home Premium support dual processors and how can optimize my system for the best performance?
A: "While all editions of Windows Vista can support multiple core CPUs, only Windows Vista Business, Ultimate, and Enterprise can support dual processors." Home versions of Vista don't see dual processors. You'll have to get Vista Business or Ultimate.