Solved Computer shutting down without warning

[Cris1]

I recently upgraded to Windows 10(not clean install) and I reformatted by PC after upgrading to Windows 10 and my keyboard won't work even with the drivers installed, I used on-screen keyboard for a while. I didn't like Windows 10 so I downgraded back by Windows 7 installation disc, note I did not have the downgrade option because I reformatted my PC after installing Win 10, I did chose the right one(64 bit). The Windows 7 installation finished and things acted strange. The mouse USB port didn't work, It was placed on the back just so you know. I moved the USB cable to the front and it worked. I downloaded all the drivers and my computer started crashing every now and then. I did not do any windows update even when on windows 10.
My temps are fine and all the fans are seem to be working. Help?

 

[EmmaRoyd]

it is possible the non functioning(in windows 7) usb port is a usb3 port which windows 10 does have native drivers for built in, windows 7 does not. you will need to download the driver from the pc/laptop manufacturer or chipset maker.

have a look, if the plastic inside that usb port is blue, its usb3.

 

[Cris1]

I already did that, but how will this procedure make my computer not shut down at random times?

 

[Taplice]

I have same problem with you before.
Install a program to monitor the CPU temperature and watch it to see how hot it gets. After a shutdown check the max temp recorded then reset the min/max. Coretemp, Speed Fan, Open Hardware Monitor, CPUID HWmonitor are a couple examples.

 

[Cris1]

The USB stuff worked now, didn't do anything. But I still wonder why my PC shuts down at random times.

 

[Cris1]

My PC is not hot, when it fails on me. Help?

 

[Cris1]

Now my computer pops an error, stating that it was a BlueScreen but It just showed a black screen, I can give the dump files if you guys want.