I have been using a Microsoft Workgroup which is working fine but I am not able to access a computer that is running Windows XP from the network and get the error message 'computer is not accessible and Logon failure: the user has not been granted the requested logon type at this computer'. So I try to join one of the computers in the network by name by going into 'Local Security Settings/Access this computer from the network' and it works until I click apply. After that I get a warning dialog box with the Security Templates message 'Failed to save Local Policy Database'. Can anyone tell me how should I solve this problem.
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