Ok, I'm running Vista Home Premium 64bit, and I recently bought Oblivion GOTY, I can install everything fine, and I can start the game, however it only gets past the Bethesda logo before it completely locks up and the Oblivion screen just stays black, Specs below:
Video Card: NVIDIA GeForce 9600 GT
Motherboard: Asus M3A78-EM
Processor: AMD Phenom(tm) 9750 Quad-Core Processor, ~2.4GHz
RAM: 4 X 2GB Patriot DDR2 800 MHz