Laptop randomly freezing up

Well, so far all the tests are coming up clean and your system is looking 100% healthy.

I would like you to run the PC in safe mode for a while to see if the problem still happens.

Tap on the F8 key from the moment you switch on and when the menu appears use the arrow keys to highlight Safe mode with Networking and hit the Enter key.

The graphics will be quite different but please continue to use the PC for several hours and see if the glitches and freezing still happen and let me know the outcome. You can then reboot the PC and it will revert back to Normal.
 
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