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656 posts

Ultimate Geek

#196692 9-Jun-2016 12:32
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Just an FYI...


Started getting this logon error on Sunday (on one computer) after installing some software updates...


"Security policies on this computer are set to show info about the last interactive sign-in, but windows couldn't retrieve that info. Contact your network administrator for help."


After entering logon password, with the result I couldn't logon to this computer.


A Google search showed many people with the problem and many fixes going right back to Windows 7...


Trying to solve the problem all of Sunday and Monday.


The only fix that enabled me to logon was the one that said to disable Internet access by turning off your modem, then logon. This allowed me to logon, and then I turned on the modem and had internet access again. Rebooting after that caused the error again when the modem was on.


While I was logged on I noticed the time was out by a couple of hours, but the date was correct. Corrected the time, and rebooted. Date was correct, but time was out by a couple of hours again. 


I logged off and rebooted, and checked the bios date and time, and it was out by a couple of hours as well. The computer is only three years old, so the RTC button battery should have been good for another 1 - 2 years.


I changed it anyway, and tested it. The voltage was 2.88v, and the new battery voltage was 2.98v.


After I changed the button cell battery, I could log on as normal without the error message. 


I'm still trying to figure out why I got the logon error because the RTC battery had failed..









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11670 posts

Uber Geek

Lifetime subscriber

  #1568619 9-Jun-2016 12:40
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I don't know the exact answer. Timestamps are used by the windows Kerebos protocol to verify security information. I'm guessing a Kerebos authentication failure of some kind occurred in the logon code. There may be more details on that specific Kerebos failure in the event log.

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