Today, about 64,000 computers in the U.S. might not be able to access the Internet anymore because of a virus.
The odds are VERY high you're not infected.
Here is the FBI site if you need it: DNS-ok.us.
If you are infected, all of the anti-virus companies have created programs to help fix your computer.
Users whose computers are still infected Monday will lose their ability to go online, and they will have to call their service providers for help deleting the malware and reconnecting to the Internet.
Just Google "DNS Changer Working Group" and that will point you to places to download those fixes.