Computer will randomly shut down, randomly start, and suddenly says windows 7 invalid

Apocski

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Mar 8, 2015
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Hey all,

Trying to troubleshoot something that just started happening with my wife's computer. I built her a gaming PC a little over a year ago. Most of the components are about 1.5 year old, and were bought new. This includes power supply, mobo, processor, graphics card. I think I reused the ram from the HP her computer morphed from, but has run issue free for awhile.

The issues:

1. Two days ago I noticed the computer randomly came on, but didn't pay much attention.
2. Yesterday my wife said her computer wanted to do a system restore as it had some sort of problem. I let it restore (seemed like the legit screen, not even in windows yet upon startup).
3. Once "restored" it said windows wasn't genuine (it is). I just cancelled through it so I could deal with it later on.
4. While playing Age of Empires her computer randomly shut down twice. Thinking it might be a virus I started scanning, but the computer wouldn't stay on long enough to finish. Inside is clean btw so don't think it's suddenly overheating.
5. I left it off and last night when I got home it was on, saying it wanted to do a system restore again.

One other odd thing I noticed is that under her Device Manager > Universal Serial Controllers, now everything under there is unknown and Windows is saying it cannot find drivers for it. This is new behavior too.

Hoping this is one issue causing all these symptoms and not the apocalypse of her machine :).

I was thinking about yanking her harddrive and putting it in my machine to see if it clears it up, which would point to a hardware (PS or Ram perhaps) issue on her end.

Any thoughts?

Thanks all!
 
I have a hunch the hard drive has been infected with some kind of malware so I would reformat it then reinstall Windows.

I don't recommend you attach the drive in it's present state to your PC as the infection could spread to your machine too, then you'll have two computers to fix.
 

Apocski

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Mar 8, 2015
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Thanks Phillip.

I am inclined to agree with you at this point. I started the machine and sat there watching the scan. The shutdown isn't a hard shutdown, meaning the computer doesn't just go off suddenly. Something is initiating the shut down as if I clicked "Shut Down" in windows, as it closes out applications. If I hit cancel, it does it again a few seconds later and does not give me time to cancel it.
 

Apocski

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Mar 8, 2015
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Well, doesn't appear to have been a virus or malware. I bought windows 8.1, put it on a boot USB, and loaded it up. Formatted the drive, and installed 8.1. It is still exhibiting the same behavior. It will randomly shut down, however it's not a HARD shutdown, meaning I'll suddenly see the windows "shutting down" screen, then it will go off, and come back on.

I did notice that the PSU was barely plugged into the power strip, so I am wondering if that somehow shorted or damaged the PSU or something internally. I went to plug the computer into the wall directly, and when I went to grab the cable it slipped right out of the surge protector. Apparently my wife moved the desk a bit and it must have pulled the cable most of the way out. Any thoughts before I start throwing parts at this thing?
 

Apocski

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Mar 8, 2015
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4,510
Interestingly enough, unplugging the mouse and keyboard and using my own seems to be keeping the computer on longer. I had one restart while I was on a walk, but it just installed windows 8.1 earlier, so could have been an automatic update of some kind while I was gone. Letting it run now to see.