Quote:Microsoft has addressed a known issue causing Windows 10 20H2 devices to force restart due to the Local Security Authority Subsystem Service (LSASS) system process crashing.
 
LSASS is a Windows process responsible for security policy enforcing and updating the security log, as well as for handling user logins, password changes, and access token creation.
 
Whenever LSASS fails, logged in users immediately lose access to the accounts, with the device force restarting after displaying an error.
 
The known issue fixed on Thursday affects both client and server Windows devices where local built-in accounts such as Guest or Administrator have been renamed.
 
"This issue is caused by duplicate built-in user accounts being created with the same security identifiers (SIDs) and relative identifiers (RIDs) during the update to Windows 10, version 20H2," Microsoft explained.
"SIDs and RIDs for built-in user accounts are well-known as documented here and must be unique on a given device.