Hmm... The reason why I use Ubuntu instead. I use wine to use windows only programs, see this site for more info.
But if you prefer a Microsoft OS I'm not forcing you.
It's actually a good thing, considering the fact that many Windows issues arise from poorly implemented third-party software and drivers. Requiring signed drivers is one way that Microsoft can ensure that Vista x64 is as reliable as possible, which will probably be a priority to the experienced user who is probably aware of the pitfalls that come with a 64-bit environment.Seriously?
That has the potential to have quite a few problems. Damn Microsoft!