JSI Tip 1521. Missing registry data can prevent browsing and connecting to a networked print server.

Use Regedt32 to navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Providers

The right hand pane should list an Order value name, a type REG_MULTI_SZ entry,
which should contain a first line of LanMan Print Services (other lines are possible).

Double click the Providers key. A LanMan Print Services sub-key should exist with at least:

Value Name	Type	String value
DisplayName	REG_SZ	LanMan Print Services
Name	REG_SZ	Win32spl.dll

Shutdown and restart the print server.