Microsoft Security | Microsoft Defender | Microsoft Defender for Identity
A security solution that detects identity-based threats and suspicious activities in on-premises Active Directory environments
USB Recovery thumb drive displays - This module is blocked from loading into the Local Security Authority
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Colin Paterson
0
Reputation points
Program Compatibility Assistant pop-up window
...\System32\DPPassFilter.dll
Microsoft Security | Microsoft Defender | Microsoft Defender for Identity
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Catherine Kyalo 3,180 Reputation points Microsoft Employee2026-04-16T16:19:13.0966667+00:00 LSA Protection requires all plug-ins loaded into LSASS to be digitally signed with a Microsoft signature. Since DPPassFilter.dll isn't, Windows blocks it.
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