hang

Let me tell you a story: Once upon a time, my os was corrupted. I safe booted it and got to backup my files and reset the whole thing. After that, everything was fine and dandy for the next 6 days i think....then my laptop started to "configure" itself without my permission ( i hate it when this...

So, lately everytime I click on a youtube vid the firefox browser would hang. also, while the vid is playing, moving the scroller down would also make it ang/freeze. it doesn't do this with my chrome browser. any idea to fix this?