I have a PC with a Core Duo CPU and 2GB RAM running Vista that I use mainly to watch TV on. (I installed a TV Tuner card and hooked cable up to it). About two days ago, all audio and video started stuttering for no apparent reason (no recent hardware or software changes). I tried all the usual things, installed new drivers for display adapter and sound card (onboard audio), ran virus/spyware scan, even a reformat and fresh OS install (Windows 7, this time). I still have the same issue. It happens when playing audio and video files. I even tried disabling the onboard audio, but the issue is still present in video playback. Any ideas? I was going to update the BIOS, but according to Asus support I need a floppy drive to accomplish this (don't have one).