Microsoft Pre-Release Definition Updates (Anti-Malware and Anti-Spyware)

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Microsoft Pre-release Definition Updates

"Microsoft offers partially-tested pre-release definition updates for download before the fully-tested (released) version is available. These updates are listed below.

You can use these pre-release definitions to clean infected computers. You can also use them to protect computers that are at an immediate risk of infection. The pre-release definition update is not meant for enterprise-wide deployment.

Pre-release updates are explicitly created for malicious software threats. You should not deploy a pre-release definition update if you are not experiencing a threat for which it was explicitly created.

Note: After additional testing, certain pre-release definition updates will be released as regular definition updates. The same binary file that was used for the pre-release definition update may be used for the released definition update."

(Once you have read the above, expand the Spoiler below for URL to proceed)

Spoiler

Visit, Microsoft Pre-Release Definitions for Anti-Malware and Anti-Spyware

For Windows 8 and 8.1 users:
Please use the "Microsoft Antimalware products including Microsoft Forefront products or Microsoft Security Essentials". (64-bit users, mpam-feX64.exe | 32-bit users, mpam-fe.exe)


Screenshots posted from Windows 8.1 Update 1 (64-bit):

BEFORE

AFTER

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