Yubico Forum

I have Yubikey 4 set up for several different users on non-domain Windows 10 systems using the Windows Logon Tool. I have a network share set up on each system for users to transfer files. They have a random, but persistent problem of the system crashing and rebooting when accessing the file share. From the logs, there is a fatal error in the lsass.exe process, requiring the system to reboot. Upon reboot, the Windows Logon Tool no longer authenticates the user with the configured Yubikey and requires reconfiguration to log in. Note that the crash does not occur when the Windows Logon Tool is disabled.


[*]Users authenticate with the Yubikey inserted into the server hosting the share (or identically configured Yubikeys inserted into both the client and server).
[*]When crashes occur, it is usually at or near the end of a file transfer.
[*]Crashes appear more likely if systems connect to each other in serial.
[*]Once crashes occur, it appears to be more likely that crashes will continue to occur.


Do you have any information on what can be done to prevent these crashes?


As an afterthought, are there group policy security settings that could be interfering with Windows Logon Tool authentication over the network and making it unstable (but mostly functional)?