So you thought that just getting a multi-core processor would increase you're speed? Yes, and no. AtomicPC has a really good article on how to optimizing Windows and applications.

Atomic PC - Optimise Windows for dual-core

"You have a new Intel QX6800 in your box, right? Every man, woman and Morris has one. The truth is the hardware you have – in most situations – is akin to having a Porsche on a dirt road out the back of your uncle’s farm. All hotted-up, with no room to move. This month, we will show you a few ways to exploit the potential of your thread-eating, multi-core pride and joy through application, operating system and driver optimisation."