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
Alternatively, point Device Manager to this folder during “Update driver” → “Browse my computer”. lenovo thinkcentre pci serial port driver
For , the “PCI Serial Port” is Intel AMT SOL . Install the Intel Management Engine Driver from Lenovo’s support page for your exact model. Do you use Intel AMT / Serial-over-LAN for remote management
lspci -nn | grep -i serial dmesg | grep -i serial Install the Intel Management Engine Driver from Lenovo’s
If you have recently reinstalled Windows on a Lenovo ThinkCentre—whether it’s an M700, M900, M710q, or an older M series model—you have likely encountered a persistent and annoying issue in your Device Manager. It sits there, often under “Other devices,” with a yellow exclamation mark: the mysterious .
: Users frequently report that standard chipset drivers do not resolve the issue, as the specific AMT package is required separately. How to Resolve the Missing Driver To clear the error, you must install the Intel Management Engine Interface (MEI) drivers rather than just the generic chipset driver. Lenovo Support Website and enter your ThinkCentre's serial number. Navigate to Drivers & Software Manual Update Search for keywords like "Management Engine" "Active Management Technology" Download and run the installer, then restart your PC to apply the changes. Summary Verdict Who needs it?