Driver Stability On M1330

I've loaded Windows 7 RTM on my Dell M1330, as it's not a business-critical PC for me and I figured it would be good to test on. It was running XP Pro previously and worked great. With Win 7 seems to run ok for a little while and then starts randomly freezing and the system becomes generally unresponsive...then comes to for a little bit and then freezes up again. It's almost as though I have better luck trying to get something done by holding down the power button and then booting up again to get a few minutes of usable time. Seems to be aggravated faster by using an internet browser (IE or Firefox).

I've tried both x64 and x86 as clean installs and had about the same luck. I've applied the most recent Vista drivers supplied by Dell and the most recent nVidia drivers. Basically, I've tried every kind of driver combination I can think of, but it still acts like a system that has driver issues, but I haven't been able to pinpoint which device is causing this. Same install disk, etc yields good performance in a VM. So, my question is...has anyone with an M1330 w/NVidia video card been able to get Win 7 RTM running solid? If so, what did you do to yield the best performance?