Re: Memory use and performance issues

So what can I do to free up some of this memory being used (What processes
or services can I shut down)?

On this specific question: don't try. Vista, unlike it's predecessors, makes much more use of any available RAM by preloading all sorts of stuff into memory, including applications which it "expects" you to use (based on your previous useage patterns - Superfetch).

This memory is instantly released if an application requires it, so it isn't causing you a problem. Indeed, it is actually helping you by speeding things up.

Remember: empty RAM is wasted RAM. You've paid for it, so let Vista use it to improve your user experience.