When you remove a printer from the Printers folder in Windows NT 4.0 or Print Manager in earlier versions of Windows NT, the printer driver file is not removed from the hard disk drive. This referenced kbarticle describes a procedure you can use if you suspect a printer driver file is corrupt: Q135406

The Windows NT Server Resource Kit includes enumprn.exe which you can use if you need to determine which printer drivers are installed on a system, enumprn will display all installed drivers, including the version number and supported platform. enumprn is a good utility to troubleshoot print servers where the clients download printer drivers from the server.

Printer Tips:

Improve print spooling performance
RAW data mode
Print to a file
Steps to Manually Remove and Reinstall a Printer Driver
Add Printer Panel icon to Windows NT Start Menu
Restrict the ability to add print drivers to Administrators and Print Operators
Hide shared printer
How to Configure Printers on FPNW to Service Pserver.nlm
Submit print jobs to wait afterhours to print
Print Server Migration Utility
NT Parallel Port Thread Priority
Set how long the port thread waits before giving up
Control printer popup messages
Printer Available Broadcasts
How to install a network printer only once for all users of the NT workstation
HP Web JetAdmin
Allow Print Operators to add a printer
Drag and Drop Printing
Add a printer failed with message "Operation could not be completed. The RPC server is unavailable."
Don't Get Notified When Remote Documents Are Printed