Facebook(?) says I have Koobface virus. Did someone guess my p/w or do I actually have the virus on my machine?

Question

My friends told me they got a weird message from me on facebook (that I didn't send). So I changed my password. Then the next time I tried to log on to facebook, it had a note that said something about I may have a virus on my machine and I need to run the McAffee scan before getting back on. But I have malwarebytes and avast so I ran those and they show no viruses. Then I signed into this yahoo e-mail and found this e-mail:
--------------------------------------…
Security Warning From Facebook
Tuesday, January 18, 2011 8:15 PM
From:
"Facebook"
Add sender to Contacts
To:
"xxxxxMExxxxxx"
Dear xxxxxxMExxxxxxx,

We have detected that your Facebook account is infected with a form of malware, or virus, called Koobface. You downloaded the virus after receiving a message from a friend, which invited you to view a video.

To restore your account, please log into Facebook and follow the instructions you see there. You can also learn more in our Help Center at:
http://www.facebook.com/help/?topic=koob…

Thanks,
Facebook Security Team
--------------------------------------…

Is this really facebook trying to inform me? I know that I never clicked on any weird messages or plugins from any links that apparently allow the Koobface virus on your system. How in the world did someone get on my facebook and send messages? Did they just guess my password? If thats the case, why does facebook think I actually have the Koobface on my machine?
How would they know? Avast and malwarebytes didn't find anything. Did someone just guess my password and send out messages with links to the virus? Or do I ACTUALLY have the virus on my computer? Please help!

Answer 1

Koobface actaully is a virus sent to you via a message or a fanpage with a video on it.

Try this article: http://hubpages.com/hub/How-To-Remove-Koobface-Virus

Good Luck in removing it

Answer 2

regrettably that's a valid digital mail and your account on facebook can even have been deactivated. No concerns nonetheless, the 1st link under information the stairs mandatory to substantiate your rid of any virus and the 2d link outlines the thank you to get your facebook account reactivated

Answer 3

Make sure you update Mawarebytes first also use Super Anti Spyware and always update before scanning..Full scan..

Answer 4

may be your pc have keyloger. so that who install itin your pc he or she know your password.(nowadays anti-virus can't find keyloger ) so make sure no key loger is install on your pc. after that restore your facebook account and change your password and secret information. (The most easy way install frash windows.)