Operating System: Windows Vista x64 (Note: might work with other versions of this os.)
C6100n PCL Driver for Windows Vista 64 BIT
Install instructions: 1. Double click on 6100PCV64EA.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:OKIDATAC6100nEnglishWinVista64.
6. Click on OK
7. Follow the prompts to finish the driver installation.