August 20, 2009
Windows 7 Crashes When Unlocking Computer (LSASS Crash)
Some users have reported an issue in which Windows 7 computers that are connected to Active Directory domains crash when users attempt to unlock them. A poster to the Microsoft TechNet discussion forums writes:
“The computer is connected to an Active Directory domain, and I lock it every time I leave my desk. Unfortunately when I come back and unlock it, 90% of the time, lsass.exe has crashed, and the PC reboots a minute later.”
The problem appears to only occur when the system is connected to an Active Directory domain.
If you are experiencing a similar issue, please let us know at info@windowsfixup.com.
Filed under Windows 7 by on Aug 20th, 2009. Comment. 
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Comments on Windows 7 Crashes When Unlocking Computer (LSASS Crash)
I have a similar problem. My PC (Windows 7 x32) are connected to Active Directory domains and randomly (50% of the time) when i unlock, the PC freeze.