For the third time, I will ask what version of KiX? If not 4.21, have you tried a newer version? If 4.21, have you tried a slightly older version? What is the exact error that references LSASS? Is there anything in the event log?

What happens if you run the script manually after logging on?
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.