pretty basic, I move the time indicator left or right and it doesn't show a change in the video until I let go of the mouse. Now, before you say to use adaptive resolution and turn off OpenGL, I already did that. Plus, it's definitely not that FAQ dealing with live update. I know it's not a problem with my computer, because when I first installed AE I could scrub through just fine
Compure is an Acer Aspire, brand new, 4GB RAM, Intel i5-2430M 2.4GHz, Intel HD Graphics 3000, etc. etc.
scratch that, turns out it was the Live Update... I feel like a monumental idiot.
Glad you solved your problem all by yourself. But here's a word of warning: don't use multiprocessing. 4 gigs may sound like a lot of memory, but for AE, it's just enough to do basic work. You won't get long RAM Previews, either. I advise putting more memory into your machine as soon as you can afford it.