JSI Tip 6744. When you try to log on to a Windows NT domain from a Windows XP client, you recevie 'The system cannot log you on to this domain because the system's computer account in its primary domain is missing or the password on that account is incorr

Microsoft Knowledge Base Article 810497 contains the following description:

When you try to log on to a Windows NT 4.0 domain from a Windows XP-based computer, you may receive the following error message: The system cannot log you on to this domain because the system's computer account in its primary domain is missing or the password on that account is incorrect.