This article was previously published under Q182918
IMPORTANT: This article contains information about editing the registry.Before you edit the registry, make sure you understand how to restore it ifa problem occurs. For information on how to do this, view the "Restoringthe Registry" online Help topic in Regedit.exe or the "Restoring a RegistryKey" online Help topic in Regedt32.exe.
When users enter a series of incorrect passwords in an attempt to log on toWindows NT using domain accounts and the Bad Logon Attempts limit for theaccount is reached, the account is locked out at the domain controller.
Windows NT generates an account lockout event (Event ID: 539) on theworkstation where the failed logon attempts occurred if the audit policy onthat workstation enables auditing of failed logon/logoff events. However,no event is logged at the domain controller. Administrators must search theevent logs of all client systems to locate the computer where the badpassword attempts originated.
Service pack information
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
152734 How to obtain the latest Windows NT 4.0 service pack
Before you apply the hotfix
Because this hotfix makes a modification to the on-disk storage of the LSA data information, Microsoft does not recommend that it be uninstalled. Perform the following steps to ease the transition back to a pre-LSA2-fix configuration in case you experience problems with the hotfix:
Perform a Full System Backup.
Run Rdisk /s. Using the /s command-line switch with Rdisk.exe causes the Sam._ and Security._ databases to be copied to the %Systemroot%\Repair folder.
Create a temporary folder under the %Systemroot% folder called Lsabackout.
Copy the following files from the %Systemroot\System32 folder to the %Systemroot%\Lsabackout folder as they are updated by LSA2-fix:
Create an updated Emergency Repair Disk (ERD) which updates the on-disk SAM and Registry information in the %Systemroot%\System32\Config folder.
Note This hotfix supersedes the fix referred to in the followingarticles in the Microsoft Knowledge Base:
ARTICLE-ID: 154087 TITLE : Access Violation in LSASS.EXE Due to Incorrect Buffer Size
ARTICLE-ID: 174205 TITLE : LSASS May Use a Large Amount of Memory on a Domain Controller
ARTICLE-ID: 129457 TITLE : Anonymous Connections May Be Able to Obtain the Password Policy
This hotfix has been posted as Lsa2fixi.exe (x86) and Lsa2fixa.exe (Alpha).For your convenience, the English version of this post-SP3 hotfix has beenposted to the following Internet location. However, Microsoft recommendsthat you install Windows NT 4.0 Service Pack 4 to correct this problem.
NOTE: An updated version of this hotfix was posted on July 20, 1998 andprovides an additional security level to systems running Windows NT 4.0Service Pack 3.
If you run Systems Management Server on systems where this hotfix isapplied, the SNMP Event Log Extension Agent (Snmpelea) generates thefollowing Event ID 3007 error:
Error opening event log file Security. Log will not be processed. Return code from OpenEventLog is 1314.
The SNMP Event Log Extension Agent requires an update to manage thesecurity event log. To resolve the SNMP Event Log Extension Agent problem,please see the following article in the Microsoft Knowledge Base:
ARTICLE-ID: 183770 TITLE : SMS: Snmpelea Unable to Open Security Event Log
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.