Timely advice from the download blog. Here's hoping you don't need it:
Let's assume you're on the receiving end of the worst April Fool's Day joke of 2009: your computer's been infected with the Conficker virus. It's a frustrating, but not insurmountable, problem. This guide will walk you through how to cleanse your computer and inoculate against other Conficker variants.
First off, make sure that you are actually infected. There aren't many warning signs, but a few will stand out if you know what to look for. One fast way to check is to try to visit any major security software publisher's Web site. If you've cleared your browser cache beforehand, and you can load the sites of Symantec, Eset, Avira, or AVG, you're clean because Conficker blocks access to them. (more)