Support for Windows Vista without any service packs installed ended on April 13, 2010. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
- Start Registry Editor.
- Add the following registry value:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\Kerberos\Parameters
Registry Value: LogLevel
Value Type: REG_DWORD
Value Data: 0x1
If the Parameters subkey does not exist, create it.
Note Remove this registry value when it is no longer needed so that performance is not degraded on the computer. Also, you can remove this registry value to disable Kerberos event logging on a specific computer.
- Quit Registry Editor. The setting will become effective immediately on Windows Server 2008, on Windows Vista, on Windows Server 2003, and on Windows XP. For Windows 2000, you must restart the computer.
From a general point of view, you may receive additional errors that can correctly be handled by the receiving client system without the user interference. Therefore, it does not reflect a severe problem that must be solved or even can be solved.
For example, an event log 3 about a Kerberos error that has the error code 0x7 KDC_ERR_S_PRINCIPAL_UNKNOWN for Server Name cifs/<IP address> will be logged when a share access is made against a server IP address and no server name. If this error is logged, the Windows client automatically tries to fail back to NTLM authentication for the user account. If this operation works, receive no error.
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