Operating System: Windows XP x64 (Note: might work with other versions of this os.)
B4200n PCL Driver for Windows XP x64 Edition - Windows Server 2003 x64 Edition
Install instructions: 1. Double click on B4200PC64EA.exe.
2. Follow the on-screen prompts to extract the driver files
3. Launch Add Printer Wizard
4. When prompted for the Manufacturer and Model click on Have Disk
5. Browse to the following location: C:OKIDATAB4200EnglishPCLWindows64.
6. Click on OK
7. Follow the prompts to finish the driver installation.