Click the down arrow at the top on the right and choose About Windows Defender. In Windows 7, click Start > Run, type Windows Defender, and press Enter.You’re looking for engine version 4.0 or higher (1.0 has the security hole). The easiest way to make sure you got the fix is to check the version number for MsMpEng.exe, the Microsoft Malware Protection Engine. In short, it was a stunning response to a bad bug (and one more reason why you should not turn off wuauserv, the Windows Update service). The “wormable” hole has been plugged, and everything is now right with Microsoft Endpoint Protection, Forefront Security, Security Essentials, Intune Endpoint Protection, and all versions of Windows Defender, from Windows 7 to 8.1 to RT to Windows 10 versions 1507, 1511, 1607, and 1703.

“What an amazing response, thanks so much Simon and MSRC! That was incredible work.” After Microsoft’s quick action on the bug, Ormandy-ordinarily one of Microsoft’s biggest critics-was swift to respond.

Windows defender windows 7 update