Service Pack 5
For NT 3.51, you need to install Service Pack 5 for Year 2000 compliance.
Microsoft will not test or update any other version. A Microsoft FTP site
to obtain SP5 is given below.
Year 2000 Update
If Service Pack 5 is installed, there is a software upgrade that needs to
be obtained and run to fix remaining Year 2000 issues. This is also linked
below.
Note: The service pack and the update files can be used on both
NT 3.51 workstation and server.
Direct Links
The following links will take you to Microsoft's pages concerning Windows
NT 3.51 and/or the Y2K issue: