Article ID: 982734 - View products that this article applies to.
Important This article contains information that shows you how to help lower security settings or how to turn off security features on a computer. You can make these changes to work around a specific problem. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. If you implement this workaround, take any appropriate additional steps to help protect the computer.
You try to access a shared folder that is located on a Windows 2000 or Windows 98-based computer from a Windows 7-based computer. You are required to provide a username and password. However, the authentication fails. Therefore, you cannot access the shared folder.
Note This issue does not occur if you access the shared folder from a Windows Vista or a Windows XP-based computer.
Windows 7 uses NTLM version 2 (NTLMv2) authentication. By default, NTLMv2 authentication is not enabled in Windows 2000 or in Windows 98. Therefore, this issue occurs.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this issue, enable NTLMv2 authentication on the Windows 2000- or the Windows 98-based computer. To do this, follow these steps:
(http://support.microsoft.com/kb/239869/ )How to enable NTLM 2 authentication
Note Samba 2.x does not support NTLMv2 authentication. Therefore, you may encounter similar issues when you try to access shared folders that are located on Samba systems from a Windows 7-based computer. To work around this issue, follow these steps on the Windows 7-based computer:
If this article does not answer your question, click this button to pose your question to other community members at Microsoft Answers:
Ask a question
If you would like to see answers to similar issues, click the following links to view topics in the Microsoft Answers forum:
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.