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