I\'ve had this same problem. I picked up the T2 "extreme" edition DVD, and attempted to play it on my PC. The PC meets all the system requirements they list on the case, but the playback was still a little choppy. Frames would freeze about once very 5-6 seconds.
It\'s incredibly stupid that they would market this 1080i transfer of the film without listing the correct system requirements. You either need to run it on HAL 9000 in software mode, or have a hardware decoder (which apparently doesn\'t exist yet)? Unbelievable.