Error code 1000008e, parameter1 c0000005, parameter2 00000000, parameter3 f7783a58, parameter4 00000000. This has been giving me problems for a month now. 100+ reboots. Most of the time it leaves no trace in the event log. I ordered a new barebones system with an Asus P4V8X-MX motherboard. I took the memory, hard drives (2), dvdrw, video card, video capture card, and modem from my old system. That system ran great for over 4 years with often 3+ month uptimes. I don't think they're a factor. What I've done to troubleshoot : Flashed BIOS to most recent version Updated ALL motherboard drivers Updated ALL drivers for other hardware (AGP video, video capture) Ran memory stress test with no problems Swapped memory sticks with spares Swapped hard drives with spares Swapped power supply with spares Removed extra hardware (AGP video, video capture, modem) Reinstalled Windows numerous times (FFR) Tried with and without SP2 during multiple FFR's Disabled System Restore Disabled Reboot on Failure option Spent hours upon hours reading forum threads Monitored via BIOS and ASUS PC Probe software CPU/MB temperatures Monitored voltages same... with probe while on, with bios after reboot I post on this forum as a last resort before I send this board back to ASUS as bad. Any more ideas you have would be greatly appreciated.