Please note that if you experiencing a problem that provides you with a specific error message, you should try searching the Microsoft Knowledge Base (KB) located on TechNet or online at http://support.microsoft.com. The knowledge base has a wide range of issues and fixes listed.
Windows NT Server & Workstation 4.0 Frequently Asked Questions
Windows NT Server 4.0 User Profiles Questions
Windows NT 4.0 Dial-Up Networking and Remote Access Service (RAS) Questions