Hello Steve,
3 gigs is nothing these days. If you're running things that close it's time to buy more space. If you're into movies etc. consider buying an external 300 gig drive. And then defrag defrag defrag! Set it up so the PC defrags when you're not on it. LW Pro for some reason really needs a clean drive. I did this and all my problems disapeared. I hope it helps you.

PS: I never let my drives go lower than 40 gigs.

Good hunting, Mitch