When I have problems with my computer I just freak out because I am afraid it will screw it up or that I will screw it up.
They say that you can always go back and undo what you did but when you don't know much about it it's not that easy!
Once in a while I will by accident hit a keyboard key (1 of those f with a number) and that changes the screen, I always take many minutes to finally find that button to put the screen back to how it was, the last time I had given up on it because I could not find it (even by click on every of these things it would not go back to before) but I just calmed myself and a while later I did it.
So I try not to do much on my computer in case I screw it up.
I don't even have the guts to install another browser in case it becomes too hard for me so I just stick with that stupid Internet Explorer