There's a solution to this:
Stop using Internet explorer. It's garbage and easily exploited.
FireFox or Chrome are far superior browsers.
Also, if you have have any virus scan software, try out AVG's free platform, it's a completely free downloadable suite that runs consistent scans (not just a one time scan, or 3-day trial like so many others out there.) It's very effective, and AVG are one of the best software security companys out there.