Number:IRCNE2014042167
Date: 2014-04-18
According to “zdnet”, Microsoft has issued a new antimalware engine and signatures to correct a bug which made systems running Microsoft Security Essentials, Forefront Client Security, Forefront Endpoint Protection, Windows Intune Endpoint Protection, and System Center Endpoint Protection unusable.
The bug, as described in this Microsoft support forum post, displayed the error "MsMpEng.exe application error. The instruction at "0x5a4d684d" referenced memory at "0x00000000" The memory could not be read" and proceeded very slowly or not at all.
The buggy update was shipped on April 15 and corrected later with a signature update which, Microsoft says, fixed the problem automatically. Users who have applied workarounds like disabling security features can re-enable the features after applying the signature update.
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