Well i was watching tv on my pc, an Athlon XP1700, MSI K7n420pro, 512 ddr, 350W antec trublu, with WinFast PVR, and when i closed the PVR, my system reboot?! i use a Leadtek ti4200 128mb ViVo with an old VCR plugged into the Video in as a tv tuner. any ideas? it doesnt always happen?