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• Looks like each time that it powers off the datetime gets reset
• I have also discovered a mysterious piece that seems to have fallenout of the motherboard What is it? (1 year later, it seems to be a tuning fork oscillator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.)
• I also found another forum post tomshardware.co.uk/forum/… except I don't have Integrated Peripherals>USB Keyboard Function option in BIOS :S
• http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/no-blue-screen-kernel-power-event-id-41-task/bca045cb-db3d-40b4-abf9-3a6ba3772ab5 - criziot
• How to Diagnose a Pre-Operating System Load or Hardware Issue

Comments summary (asked by Random moderator)

Q. tell me, if the computer restarts, is it immediately? Does it take a second and then restarts? Do you see (BSOD) or hear (PSU, short circuit) any suspicious when it happens? After reading trough it, it remains the mainboard that is faulty. – JohannesM

Q. Try stress-testing the system with Prime95 and see if errors or shutdowns occur when the CPU is under full load. – speakr

Q. I had similar random/intermittent problems with my old board. It gave one of a few different symptoms: keyboard and/or mouse would die and/or the RAM wouldn't work and/or it would shut down. It was in bad shape. One problems was that my old PSU had literally burned the connector on it (browned around the pins), another was that a broken lead inside the layers of the PCB would work sometimes if it happened to be hot or if I bent the board—by jamming a hunk of wood behind it. I managed to keep the board alive for several years, but eventually nothing I did would make it work correctly anymore. – Synetech

Q. Have you tried a different power cord, surge protector, outlet (on a different circuit). It's worth a shot just to ensure it's not subpar wiring or a week circuit (dips in power may cause shutdown if the PSU can't pull enough juice from the wall). – Kyle

Q. Re-check your mainboard manual and all PSU connections to your mainboard to be sure that nothing is missing (e.g. 12V ATX 4-pin/6-pin connector). If you can provoke shutdowns with Prime95, then consider buying new hardware -- a stable system should run Prime95 for 24h without any errors. Prime95 mentions errors in the log when they occur and gives a summary after the stress test was stopped manually (e.g. "0 errors, 0 warnings", if all is fine) – speakr

Q. With one PC I had a short curcuit. The power button on the front plate had its cables soldered, but not isolated, and the contacts were very close to the metal case. A heavier touch was enough to cause a shutdown. The PC's vibration could be enough – ott--

Q. I wonder if you dare to operate components without the case, that is remove motherboard, power, disk ( just put the motherboard on a wooden desk). Don't bend the adapters when running like that. – ott--

• Looks like each time that it powers off the datetime gets reset
• I have also discovered a mysterious piece that seems to have fallenout of the motherboard What is it? (1 year later, it seems to be a tuning fork oscillator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.)
• I also found another forum post tomshardware.co.uk/forum/… except I don't have Integrated Peripherals>USB Keyboard Function option in BIOS :S
• http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/no-blue-screen-kernel-power-event-id-41-task/bca045cb-db3d-40b4-abf9-3a6ba3772ab5 - criziot
• How to Diagnose a Pre-Operating System Load or Hardware Issue

Comments summary (asked by Random moderator)

Q. tell me, if the computer restarts, is it immediately? Does it take a second and then restarts? Do you see (BSOD) or hear (PSU, short circuit) any suspicious when it happens? After reading trough it, it remains the mainboard that is faulty. – JohannesM

Q. Try stress-testing the system with Prime95 and see if errors or shutdowns occur when the CPU is under full load. – speakr

Q. I had similar random/intermittent problems with my old board. It gave one of a few different symptoms: keyboard and/or mouse would die and/or the RAM wouldn't work and/or it would shut down. It was in bad shape. One problems was that my old PSU had literally burned the connector on it (browned around the pins), another was that a broken lead inside the layers of the PCB would work sometimes if it happened to be hot or if I bent the board—by jamming a hunk of wood behind it. I managed to keep the board alive for several years, but eventually nothing I did would make it work correctly anymore. – Synetech

Q. Have you tried a different power cord, surge protector, outlet (on a different circuit). It's worth a shot just to ensure it's not subpar wiring or a week circuit (dips in power may cause shutdown if the PSU can't pull enough juice from the wall). – Kyle

Q. Re-check your mainboard manual and all PSU connections to your mainboard to be sure that nothing is missing (e.g. 12V ATX 4-pin/6-pin connector). If you can provoke shutdowns with Prime95, then consider buying new hardware -- a stable system should run Prime95 for 24h without any errors. Prime95 mentions errors in the log when they occur and gives a summary after the stress test was stopped manually (e.g. "0 errors, 0 warnings", if all is fine) – speakr

Q. With one PC I had a short curcuit. The power button on the front plate had its cables soldered, but not isolated, and the contacts were very close to the metal case. A heavier touch was enough to cause a shutdown. The PC's vibration could be enough – ott--

Q. I wonder if you dare to operate components without the case, that is remove motherboard, power, disk ( just put the motherboard on a wooden desk). Don't bend the adapters when running like that. – ott--

• Looks like each time that it powers off the datetime gets reset
• I have also discovered a mysterious piece that seems to have fallen out of the motherboard i119.photobucket.com/albums/o126/yurikolovsky/strangepiece.jpg What is it? (1 year later, it seems to be a tuning fork oscillator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.)
• I also found another forum post tomshardware.co.uk/forum/… except I don't have Integrated Peripherals>USB Keyboard Function option in BIOS :S
• http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/no-blue-screen-kernel-power-event-id-41-task/bca045cb-db3d-40b4-abf9-3a6ba3772ab5 - criziot
• How to Diagnose a Pre-Operating System Load or Hardware Issue

1 year later UPDATE

The strange piece that fell out seems to be a tuning fork oscillator/resonator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.

• Looks like each time that it powers off the datetime gets reset
• I have also discovered a mysterious piece that seems to have fallenout of the motherboard What is it? (1 year later, it seems to be a tuning fork oscillator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.)
• I also found another forum post tomshardware.co.uk/forum/… except I don't have Integrated Peripherals>USB Keyboard Function option in BIOS :S
• http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/no-blue-screen-kernel-power-event-id-41-task/bca045cb-db3d-40b4-abf9-3a6ba3772ab5 - criziot
• How to Diagnose a Pre-Operating System Load or Hardware Issue

1 year later Update

The strange piece that fell out seems to be a tuning fork oscillator/resonator that is responsible for counting seconds, which explains the clock getting reset and may have been responsible for all of this.