Windows 7 Performance Index dropped on Laptop

Hey guys,

Just got a weird scenario.

I have a Toshiba Satellite A300M00 Notebook and got it about a year ago with Vista Home Premium. I purchased the new Windows 7 Home Premium (Full) and did a clean instal.

Now they issues is this. When i was running windows vista my WEI (windows Experience Index) was at an overall 5.0 (knowing that vista's max is 5.9, my laptop was pretty powerful and ran games and other things beautifully).

So knowing that Windows 7 is supposed to increase computer performance, the opposite has actually happened on my system (both by looking at the WEI which is now 3.8 and the performance itself with games in particular being much slower).

I was wondering why this may be the case, i have installed all driver related to the graphics card which is an ATI Mobility Radeon HD3650 512MB Ram. My CUP is 2.5Ghz Dual core, i have 4GB Ram and a 400GB Harddrive.

The windows experience index is as follows. Processor went from about 5.4 to 3.8, RAM went from 5.0 to 4.0, Graphics stayed about the same at 5.2, gaming performance went from 5.5 to 6.1 and HDD went from about 5.2 to 4.9.

The lowest of those being the Processor is the subscore and not only is this rating system different but the performance is actually worse with games, Far Cry 2 i use to be able to run 1,024 x 768 with 2XAA at Very High Graphics nicely (just as an example).

So anyone with any answers would be awsome.

Thanks