Self-Booting Computer
What would cause a computer to boot itself? I have a PC that seems to be working just fine (a little slow) but sometimes at night, after we have all gone to bed and we know it has been shut down, it will boot itself. Any ideas what might cause this?
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Good call vallis...
It sounds like a sticking power button connection. Unplug it and press the power on button a couple of times to see if it fixes it.
> not only power deals in restarting the pc, some ram have failed for hardware side.... for software, maybe possible virus or spywares, malware etc, contaminated to your pc. --- but sometimes this effective even you are contaminated with viruses you can prohibit to restarting your pc by doing this:
goto control panel-administrative tools-services-remote procedure call (RPC) (not the locator) - recovery - and change all restart the computer ---
goodluck!
Have a scan from the free McAfee Online Scan, the virus could be causing of this:
http://us.mcafee.com/root/catalog.asp?catid=free
And
Goto Start > Settings> Control Panel > Power Options ........... make sure there is nothing to set the PC to turn on the power after few minits or hours ...... You could go to CMOS (during the startup of the PC, got mention you need to press F2 or F8 or Delete or F12 .... etc in order to go to the CMOS, depends on the design of the PC) ..... try to play around without save for the changes of the setting. Just look around and see whether can found some setting for the power options .....
http://us.mcafee.com/root/catalog.asp?catid=free
And
Goto Start > Settings> Control Panel > Power Options ........... make sure there is nothing to set the PC to turn on the power after few minits or hours ...... You could go to CMOS (during the startup of the PC, got mention you need to press F2 or F8 or Delete or F12 .... etc in order to go to the CMOS, depends on the design of the PC) ..... try to play around without save for the changes of the setting. Just look around and see whether can found some setting for the power options .....
if your antivirus software is set to update late at night as well as windows updates. They will require a reboot and will perform those reboots automatically. check your live update to see what time of day the updates are done. if it is this time, then you've solved it. Change the time to an earlier time and yes, you should power down the system at night when you go to bed to save energy.
If you are actually doing a power down (not standby) from the OS then the only way this can happen is the following.
In the BIOS there are power on settings, this is what the computer does by itself when power is applied. The setting is probably set to Power ON. Other choices are typically "Last State" or "Stay Off". To check this behavior turn the computer off. Then disconnect the power cord. When you plug the power cord back in I suspect that the computer will boot automatically. If this is the case then you must change the BIOS setting. Now the night time boot is likely caused by short power blips - power off/on causes the computer to boot.
In the BIOS there are power on settings, this is what the computer does by itself when power is applied. The setting is probably set to Power ON. Other choices are typically "Last State" or "Stay Off". To check this behavior turn the computer off. Then disconnect the power cord. When you plug the power cord back in I suspect that the computer will boot automatically. If this is the case then you must change the BIOS setting. Now the night time boot is likely caused by short power blips - power off/on causes the computer to boot.