The most confusing aspect of this problem is the name. When users see "PCI Serial Port," they often imagine a physical RS-232 serial port on the back of the PC (the legacy 9-pin connector used for old modems, industrial equipment, or label printers).
If the yellow mark is gone, success!
Most ThinkCentre models are business-class machines designed for enterprise management. They typically feature Intel vPro technology. This technology allows IT administrators to remotely manage the computer, even if the operating system is turned off or the hard drive has failed. lenovo thinkcentre pci serial port driver
MosChip MCS9865 / MCS9820 / MCS9900
However, on modern Lenovo ThinkCentre computers, the PCI Serial Port listed in Device Manager is almost a legacy COM port. It is, in fact, a component of the Intel Management Engine Interface (MEI) . The most confusing aspect of this problem is the name
Do you use Intel AMT / Serial-over-LAN for remote management? ├─ Yes → Install full Intel ME + SOL driver └─ No → Disable serial port in BIOS → unknown device disappears MosChip MCS9865 / MCS9820 / MCS9900 However, on