Operating System: Windows 2000 (Note: might work with other versions of this os.)
Multilingual B2500MFP, B2520MFP and B2540MFP GDI Driver for Windows XP and Windows 2000
Install instructions: 1. Double click on B25XXGDXPEA.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:OKIDATAB25XXMFPGDIWin2k_XPLFXGPU2K.INF.
6. Click on OK
7. Follow the prompts to finish the driver installation.