In the last week, each time I access the Web, within 1 minute of being online, two new web pages will appear. Neither page accesses any content. The message I get from IE is "HTTP Error 404 - File or Directory not found." I am not initiating this action. Also, I am getting "pop-up" web pages without clicking any links.
I reinstalled Windows Vista to stop the problem. I also installed Trend Micro but it only blocks some pop-ups rather than all of them. My IE Pop-Up Blocker is enabled; so is my IE Phishing monitor.
What is happening here? How do I fix it? Thanks.