This issue happened to me several times this weekend. I would click on a link on a web page. I would be taken to another web page that had a message to the effect of "don't trust pop-up blockers". At that point the Microsoft Office 2000 Premium Installer would start up.
After clicking Cancel several times, the installer would stop. I could then X out of the web page and go about my business. This is not isolated to just one web page, and it happened about a half a dozen times over the course of about 3 hours of browsing the Internet. I was going to several sites doing research on one topic, so the different sites may have been connected somehow.
Since this happened the day after fully updating and scanning my computer with the above AV and antispyware/adware applications, I am puzzled about what this is. I have not encountered this before this past weekend.
I have not experienced any other problems with my computer since then.
Anyone have any ideas? I'd just like to a) make sure I can prevent this from occuring again, and b) make sure I have removed any malicious software that may have been installed.