Trouble #1 pop up ads
Don't click on pop up ads, just press ctrl+F4 to get rid of it.
Trouble #2 computer can't turn on
There are two reasons possibly why your computer can't turn on. One reason is that it is dead and not plugged in, if that is so, plug it in. Another reason is that there are some cables that need to be plugged in.
Trouble #3 "website could not be found"