Windows 10: My pc reboots after being left alone for hours, instead of just waking up and continuing...

My pc reboots after being left alone for hours, instead of just waking up and continuing from where it was left from and this restart process is kind of long. How can i solve this? I've been facing this issue for some time now and i do not particularity like it because it wastes to much time. I would much appreciate if someone can help or give me guidance on how to sort this problem out,

:)

 

PC Reboots Continuously. No Post Screen.

Hey folks. I was playing some L.A. Noire then went out. Several hours later I come in to Boot my PC and it just continuously reboots and doesnt even get to the post screen. I've tried clearing CMOS but now it just beeps while rebooting over and over. Specs are on the left.

Any ideas?

 

Computer reboots instead of wakes from sleep

This made no difference. Upon trying to wake the computer, it goes into BIOS. The Windows boot drive is absent in the BIOS boot order list, so I have to turn the computer off, then reboot. Upon booting, any windows that were open prior to sleep are now
closed (i.e., it is a cold boot, not a wake from sleep).

 

PC reboots (no BSOD) on CPU stress

Hi fellow TPU members,

not too long ago, the box my gf's PC was transported in gave way on the stairs. Yes, you got it right, that sent a PC tumbling down a flight of steps alright.

Stuff broke. Also, stuff remained intact somehow.

I bought her a new case, new CPU cooler and we removed the floppy drive, so far so good. But the PC started crashing for no apparent reason, without a BSOD.

I tested:

• Memtest86+, left overnight, 0 errors
• Scanned the HDD for errors, nothing there
• Left FurMark burning up the GFX card and drawing some power, no problems there
• Ran Ubuntu from a Live CD doing nothing special, didn't crash
• Ran OCCT, Linpack, Prime95, all 3 caused reboots within minutes
• Oh, and I disabled "Restart on error" so I'm sure it's not a BSOD.

Now, I can still try and test something CPU intensive on Ubuntu, but my guess is the CPU didn't survive.
Before I do anything drastic like whippin' out the magic wallet and get her a new AMD quad, is there anything I didn't see?
I'm guessing the motherboard could be borkered as well, but can I check that other than replacing the CPU with a working one?
Any suggestions on which proggies I can use from an Ubuntu Live CD to stress the CPU?