Win32/Vundo is a threat detected by either Microsoft Security Essentials, Windows Defender for Windows 8 or Microsoft Safety Scanner. This Win32/Vundo threat is classified as PUP a Potentially Unwanted Program by Microsoft because it inflicts and acts as a malicious threat into your computer system. Win32/Vundo is not a virus but it does act like one. Win32/Vundo is adware which is bundled using custom installers and dropped on your computer during the installation process. Most users have no idea how this Win32/Vundo threat is installed on there computer and what it is, until Microsoft Security Essentials, Windows Defender for Windows 8 or Microsoft Safety Scanner detects it as a malicious threat or virus. Follow our instruction to remove this Win32/Vundo threat from your computer.