Ocom: Printer Driver
The most common configuration error is incorrect paper size. OCOM printers typically use 80mm (3 1/8") or 58mm (2 1/4") paper.
Symptom: A yellow exclamation mark next to "Unknown device." Cause: Windows disabled the driver due to a missing digital signature (common in older OCOM models after Windows 11 update 22H2). Fix: ocom printer driver