Just Upgraded to Windows 7 (64 bit), need tweeks

We just upgraded my at work system from Windows XP to Windows 7 (64 bit), and now its time to set the system up for best performance in SW.

My question to all the Windows 7 experts is what should I do to the settings to get the best SW performance?

System is a Dell Precision 690

has:

2 Intel Xeon 5160 CPU's at 3 Ghz

4 Gb ram

Nvidia Quatro FX 3450/4000 SDI

Windows 7 (64 bit)

Future plan is to have 8 Gb RAM and a better video card (Nvidia Quattro FX 1800 is being looked at).

Basically I want to know what to turn on / off in windows and SW right now, we are going to update the hardware as shown above later.

Thanks,

SolidworksAdministration