This happened to me for about 2 weeks and ended about 1 1/2 weeks ago. The difference being it was happening everywhere not just this site and no pop up banners. The typing problems and the browser not working/freezing. Had to restart my computer so many times. I made sure Windows was updated, deleted cookies and ran virus scans above and beyond the set scans. Nothing showed up in the scans. It was miserable and I was so glad when it stopped. Hope you find a solution or it stops for you as well.