I recently built a new system with a Gigabyte GA-MA770-UD3 motherboard and the northbridge filter driver will not install with the ATI installer. I've tried it several times and I have used the custom option. The system reboots, I run the installer again, and it tells me the northbridge driver is not installed. I'm having a horrible problem with my new Vista x64 machine where it will keep locking up, particularly in a game; I have to manually restart to get the computer running again. I've scanned the memory with memtest and Window memory diagnostic and they found 0 errors. I'm positive it's not my hard drive. That leaves the motherboard or a software issue as the culprit. I'm thinking the NB driver might be the solution, so could someone tell me how in the world I'm supposed to install it?