How to remove Facebook Chat Virus

How to remove Facebook Chat Virus “hi. how are you?” AKA KOOBFACE
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Sample Chat :

“hi. how are you?”

*If you reply , it will sent you :*

“Wanna laugh? ”

*If you reply again , it will sent you :*

“It is you on the video ?)) want to see?)”

*If you reply again , it will sent you the virus link*

The sample website :

Will my computer get  infected once I clicked the link ?
No ! Unless you download some files from the link. (Currently they use drive-by method)

HOW TO FIX!
If your computer is infected and can’t access to Facebook , please refer to Method 1.

Method 1 :

Windows operating systems contain a file called ‘hosts’ that will force resolution of your domain name.

1. Open the hosts file
   1. Go to the Start menu and choose Run. Type the following in the Run dialog box:
      1. For Windows NT and Windows 2000
         1. C:\winnt\system32\drivers\etc
      2. Windows XP, Windows Vista or Windows 7
         1. C:\Windows\System32\drivers\etc
   2. Click the OK button (This should open a window with several files in it.)
   3. Find the file called ‘hosts’ and double–click it. If prompted, specify that you would like to choose a program to open the file withfrom a list of programs.
      1. Choose ‘Notepad’ from the list of available programs.
2. Edit and save the hosts file
   1. The contents of your hosts file should look something like this
   2. Find the line with the word facebook.com (example: “127.0.0.1 http://www.facebook.com”  )
   3. Remove it.
   4. Close the hosts file and save it when prompted