I tried to solve the same problem a few weeks ago using a desktop with a P4 2.6 with 1.28 RAM. See my post #274936 with many of the same suggestions. Although the thread sounds like I solved the problem I didn't really and eventually gave up and bought a new computer. Some of the things I tried might help you.

My guess is that all the defragging and Windows adjustments won't solve your problem in the long term. Your computer just isn't up the task of Real Tracks. I agree that PG should make a clear statement of the realistic spec you need for RT.

Tony Wright