Question 1

Install fails or stalls?

Accepted Answer

Remove any existing OKI C5800/C5900 driver packages via Print Management, restart the Print Spooler service, then run the C5800 installer as administrator.

Question 2

Printer not detected?

Accepted Answer

Confirm USB cable/port or network connection. For network models, assign a static IP and add a Standard TCP/IP port manually if auto-discovery fails.

Question 3

Driver version conflicts?

Accepted Answer

Uninstall older OKI C5800 PCL/PostScript drivers from Driver Store, match 32-/64-bit Windows architecture, and avoid using generic C5900 drivers. Reinstall the correct OKI C5800 package.

OKI C5800 Driver