Integrated V.90/V.92 56K modem functionality (HSP56 MicroModem) Common Issues & Maintenance
: If the card is listed as an "Unknown Device" or "Multimedia Audio Controller," check the Hardware ID under the Details tab to confirm the vendor (e.g., 13F6 for C-Media).
Since the manufacturer could be anyone (Asus, GVC, Motorola, Zoltrix, etc.), you cannot search just by "HSP56." You need the specific model.
: Right-click the device and choose Update driver > Browse my computer for drivers .