System hangs while browsing in Internet Explorer

Hi, I have 2 issues: 1. My compute hangs when browsing in Internet Explorer. It freezes and then i will need to force shut down everytime using power button. 2. While watch video or browsing, my system hangs for 5 seconds and turns to normal and pops out message saying "Display driver stopped responding and recovered successfully". My system specifications: 1. Windows® 7 Home...