A significant issue or part of the problem is the multiple ads downloading and appearing in your browser of choice.
Many more download links appear on a web page such as c|net downloads without this program than with: http://adblockplus.org/en/
As you both have regrettably found out, clicking the wrong download link can/will lead to issues such as this one. If these links are blocked, you cannot click them.
NOTE: IE is not supported by this add on. Time to think of using another (possibly safer) browser?