Search for the specific ID (e.g., VEN_XXXX&DEV_XXXX ) online to identify the exact chipset (likely , WCH , or Sunix ).

: Look for an entry labeled "PCI Serial Port" or "PCI Simple Communications Controller" with a yellow exclamation mark under Other devices . Update Driver : Right-click the device and select Update driver . Choose Browse my computer for drivers .

Right-click the problematic PCI device and select Update driver. Choose Browse my computer for drivers.

Look for the VEN (Vendor) and DEV (Device) codes. Common ones for this card include: NetMos/MosChip Vendor 1415: Oxford Semiconductor Vendor 4348: WCH (WinChipHead) PCI 60806A AA9LRV1 Drivers Download Links

Open Device Manager → Right-click unknown device → Properties → Details → Hardware IDs. Look for: