Win8.1 Freezes after 5+ minutes of video or gaming

[Valex]

Hey All,

I looked in other thread, but could not find an answer to my problem. I ran defrag, and tried system restore. The PC normally runs smooth and very fast.

Just recently my Samsung Chronos completly freezes after minutes of gaming or video. It also freezes in just browsing but much less often. Sound is repeated last couple of seconds of audio.
Only solution is to hard reset.

- Win8.1
- Samsung Chronos series 7
- ADM Radeon HD8600/8700M
- Intel(R) HD Graphics 4000

What diagnostic should I run in order to identify the problem?

Thank you kindly for all of your help.

 

[Valex]

When I run the movie/game in the background it holds much longer... I am so confused about this. Did the temperature check during freeze and it seems OK.