If you are looking for a software driver for a computer part, "XH390" does not correspond to a major motherboard or chipset series (like Intel's Z390 or X299). If you are experiencing "unknown device" errors in Windows: Open .
Some counterfeit Prolific chips (common on cheap XH390 adapters) are deliberately blocked by Microsoft’s inbox driver. If this fails, proceed to manual methods. xh390 driver upd