Hi everyone

I m new here so tell me if this is the wrong mplace to start my thread.
I have a really annoying problem, I will try to explain it in a simple way: whenever I watch something on a streaming site, like Youtube, Daily Motion or Stage 6, my PC shuts down !!! It does it after a few minutes. Every single time. Driving me nuts
Now after dealing with this for a month or so, I found a way to kinda avoid that: I noticed that there are more chances for this to happen when I start watching the vid while it is still is loading it.
So now, first I wait for the video to be fully loaded, then open another window, nothing in particular.
Then I start to watch the vid, and pause it after 10 min. And thats where its weird: if after pausing it I just go on the other page, do whatever I want for a few minutes, like writing this post while I'm watching a manga on Daily Motion, I can go back to the vid, watch another 10 minutes of it
and then pause it again to repeat the process
With this my PC doesn't crash.
Also, if I watch something shorter than 10 min, it still crashes - haven't tried to wait for it to load yet, but I reckon it would be ok.
I think it s better if I wait for your questions before giving more you details.
Many thanks fellas