Internet / Page Problems?

[922]

Hello my name is Rachel and I am having problems with my internet. Without my consent my computer will shut down and will not re-start and it will keep shutting down till I press the home button then its fine. A simple internet search is fine but as soon as I go to a website or application it shuts down. But when I go to Facebook , YouTube , or Netflix any other page really it shuts down without me allowing it. I thought maybe it was a memory issue or a virus but I ran a quick scan and it says am in the clear what should I do please I need help! it makes homework a lot harder to do lol