Adobe PDF exploit
There is an exploit in the Adobe PDF plugin for web browsers. Adobe has already fixed the vulnerability, so you should all update your plugins. This vulnerability affects users of Internet Explorer and Firefox, on Windows and Linux (and any other browser/OS combination that uses the Adobe plugin).
What specifically should I be looking for on this site?
You should be looking for the Adobe Reader updates. You were running Windows last time I checked, so you would go to this page to get it.
Sorry it took me so long to respond.