browser problem

My sister is in Texas on business and is going out of her mind. She can get emails from her outlook ok, but can not get on the internet. Just keeps spinning, sometimes get an error message. Was on previously, kept getting some pop up saying to download a virus protection which she kept clicking out of, can not get back on since then. She has changed hotels since she thought that was the problem, still happening. She has checked the wireless connection and it says it is connected with high connection speed. Thought it might be IE so I sent her Firefox and she downloaded that, but still can’t get on.