Depends on what version you have. 9 and 10 have had a lot of bugs and been a problem. I went back to 8 and have no problems. You might think about downloading Google Chrome for a back up. Or your Internet connection is not working right.
INTERNET EXPLORER STILL EXISTS?????? Try to use Chrome or something. If that is working, then reinstall Internet Explorer (IE). If both IE and Chrome or whatever aren't working, there's something wrong with your computer or wifi.