laptop at 100% cpu all the time

hey guys, helping a friend with a laptop, thing was really slow had vista on it, so formatted it and installed win7 x64. its a toshiba satellite L500D. dual core 2.2ghz. 4 gig ram. (did a fresh install not an update)

Even on a vanilla install, just running windows update alone is lagging the heck out of it. cpu is sitting at 100% but looking at processes they are all sitting at zero. So i cant see what process is causing this.

Opening web browser is really lagged it will freeze up and say not responding then come back after a while.

temperatures are good (50deg C). power profile is fine. Even turned off all animations. still same issue.

Its not a speed machine, however it should be able to browse the web without lag I am not asking much of it!! CPU is high, RAM usage is less than 20%.

What else can I do with it?

Well i think there may be an actual hardware issue. I run the windows performance index. It scored a whopping 2.0!!

The second lowest score was 4.0, the graphics was 4.9 which is fairly good. but it was the CPU that rated as 2.0

So Not much i can do about that I guess. Turned off aero, turned it onto adjust for best performance, went through and updated all the drivers, its got a bit more snap to it now.