Some Windows 11 users are reporting that Windows Security is showing a “Local Security authority protection is off. Your device may be vulnerable” warning even if the feature is enabled.
As Windows Latest reports, the bug in question is in Windows Defender (KB5007651), which is a mandatory security update that’s a part of Windows 11’s March 2023 update. Local Security Authority (LSA) is a protected subsystem that authenticates and logs users onto a PC's local system. LSA also maintains information about all aspects of local security on a system, which is collectively known as the Local Security Policy of the system. In short, it prevents the theft of sensitive information such as login credentials.
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