Conficker

Malware type: Worm

Aliases:
Symantec: W32.Downadup.C
F-Secure: Worm:W32/Downadup.DY
CA: Win32/Conficker.C
Sophos: Mal/Conficker-B

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Protection:

First of all Conficker Worm only impacts Windows Operating System so Mac’s(Macintosh) and Unix/Linux users are safe!

Step 1: Open Internet Explorer Go to Tools>Windows Update make sure you are up to date with patches.

Step 2: Scan your PC Online with Microsoft Live Scanner

Step 3: Download Conficker Removal Tool from Symantec's Website , Trend Micro’s Cleanup Engine, or Malwarebytes

Step 4: Download AVG Antivirus FREE software from http://www.avg.com/free & make sure to update your virus definition.

Well after these 4 steps above, you should be safe.

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more info about Conficker and other malwares