You can find manual downloads for BIOS, Chipset, and Audio on the Lenovo X390 Drivers & Software page.
It typically features a body length of approximately 46.5mm and is designed for high-torque performance in compact spaces. xh390 driver upd
Searching “xh390 driver upd” may lead you to auto-updater scams. Never pay for drivers. Legitimate drivers are free from the manufacturer or Microsoft. You can find manual downloads for BIOS, Chipset,