Over 300,000 internet users might lose access to their computers at midnight tonight, because of the the deadline made by the FBI last year to remove spam and viruses ends. Millions of computers were infected with the so-called "Internet Doomsday" virus last November by some hackers. A lot of people got the PCs cleaned, but anyone using a computer still infected with the virus will likely lose Internet access.

Online security firms, Facebook and the FBI are offering free diagnostic checks for users whose computers may be infected. Here are links to several:

• Malware check: http://dns-ok.us/

• FBI: https://forms.fbi.gov/check-to-see-if-your-computer-is-using-rogue-DNS

• DNS Changer Working Group: http://www.dcwg.org/

• Facebook: http://www.facebook.com/notes/facebook-security/notifying-dnschanger-victims/10150833689760766

• McAfee: http://www.mcafee.com/dnscheck

Check out more about the "Internet Blackout" here!!!