Using Explorer 6 with XP.Internet Explorer 6 is way out of date! It was also a disaster regarding vulnerabilities to malware.
The quickest solution is to go to http://www.mozilla.org, download and install Firefox and see how that works for you. I'm pretty sure that Firefox has a setting to prevent popup windows. There are also add-ons that will lock down the web browser to avoid getting malware.
Also, as someone else on this thread mentioned, there is a good chance you have viruses or other malware on your computer. There are several free anti-virus programs that can help you clean up your system. I don't normally run Windows, so I haven't kept up with the latest reviews, but I'm sure others on this forum can provide suggestions.