Unity UI operation stutter in Windows 7, Aero is disabled

When interacting with the scene, I can be moving, rotating or scaling an object, and every 5 seconds or so it will stick for a few seconds, then continue, and it repeats as long as I've tried to use it. Does anyone have any idea what I could do?

I just got a new laptop with Win7 64bit, and I think i’m getting the same problem.

When I open it, after 2 clicks, it freezes. But if I maximize the screen it works, until the next 2 clicks. Then I have to de-maximize to make it work again.

It’s impossible to work like this.