ok i have 3 computers

1st one Desktop

Pentium dual core CPU E5200 @ 2.50 GHz
6GB ram
NVIDIA GeForce GTS 250
32" TV
Windows Vista 64 bit
Windows Experience Index 5.2 (Memory Operations per second being 5.2)

Runs 3 windows ok as long as its not peak time or high grapic areas, can 5 box somthings but can get a bit laggy.

2nd Comp Desktop

Intel(R) Core(TM) i3 CPU 550 @ 3.20GHz
7GB Ram
AMD Radeon HD 6450
Windows 7 64 bit
Windows Experience Index 4.5 (desktop Performance for windows Aero being 4.5)

Can run 1 window on dummys in org with no problems, try to do a BG or questing and it freeze's and locks out!

3rd comp Laptop

Celeron (R) Dual Core CPU T3500 @ 2.10GHz
2GB Ram (yes i know this will need more)
onboard Mobile Intel(R) 4 Series chipset (Suposedly 1GB Ram but is shared with the main Ram)
Windows 7 64 bit
Windows Experience Index 3.3 (Gaming Graphics being 3.3, hence why more ram needed)

Can run 1 window on dummys in org with no problems, try to do a BG or questing and it freeze's and locks out!

Supose my question is here that the suposedy 2 better computers (the 2nd desktop and the laptop) should at least be able to run one window each, so is there a problem with windows 7 that i am not seeing as that seems to be the common factor or am i barking up the wrong tree?

Thanks in advance

Dougie