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You're a bit sparse with information here. When does that error show up? On which Windows version(s) does it show up? What is the exact error text in the event viewer?<br />

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You're a bit sparse with information here. When does that error show up? On which Windows version(s) does it show up? What is the exact error text in the event viewer?


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Sorry about that. &nbsp;Windows 2000 server, service pak 4. &nbsp;<br />
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537,AUDIT FAILURE,Security,Thu Apr 08 12:37:28 2004,NT AUTHORITY\SYSTEM,Logon Failure: &nbsp; &nbsp; Reason: &nbsp;An unexpected error occurred during logon &nbsp; &nbsp; User Name: &nbsp; &nbsp; &nbsp;Domain: &nbsp; &nbsp; &nbsp; Logon Type: 3 &nbsp; &nbsp; Logon Process: Kerberos &nbsp; &nbsp; Authentication Package: Kerberos &nbsp; &nbsp; Workstation Name: - &nbsp;<br />
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Thanks for your help.
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Sorry about that.  Windows 2000 server, service pak 4.  

537,AUDIT FAILURE,Security,Thu Apr 08 12:37:28 2004,NT AUTHORITY\SYSTEM,Logon Failure:     Reason:  An unexpected error occurred during logon     User Name:      Domain:       Logon Type: 3     Logon Process: Kerberos     Authentication Package: Kerberos     Workstation Name: -  

Thanks for your help.

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The server is a DC, with Wins secondary, dhcp, and global catalog, file and print sharing as well.
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The server is a DC, with Wins secondary, dhcp, and global catalog, file and print sharing as well.

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Thanks for the link. &nbsp;It has been very useful.
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Thanks for the link.  It has been very useful.

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Glad you could solve it with the bit of information I was able to provide; may I ask what the problem was?<br />

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Glad you could solve it with the bit of information I was able to provide; may I ask what the problem was?


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The link to the eventID.net &nbsp;helped me to better troubleshoot the issue, because users were prompted to change their passwords. &nbsp;:)
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The link to the eventID.net  helped me to better troubleshoot the issue, because users were prompted to change their passwords.  :)

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NT AUTHORITY\SYSTEM,Logon Failure shows up under Event ID 537. &nbsp;How can I address this event so it doesn't happen again?<br />
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Thanks.
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NT AUTHORITY\SYSTEM,Logon Failure shows up under Event ID 537.  How can I address this event so it doesn't happen again?

Thanks.

NT AUTHORITY\SYSTEM,Logon Failure, how can I fix this

Operating system security (OS security) is the process of ensuring OS integrity, confidentiality and availability. OS security refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions. OS security encompasses all preventive-control techniques, which safeguard any computer assets capable of being stolen, edited or deleted if OS security is compromised, including authentication, passwords and threats to systems and programs.