After you fix the PCI Serial Port, back up the driver:
: Download the .exe file, run the installer, and restart your computer once the process is complete. Alternative: Use Device Manager Pci Serial Port Driver Windows 10 64 Bit Lenovo
If you aren't sure which driver to pick, use the Hardware ID to be precise. Right-click the button and select Device Manager . Find PCI Serial Port (usually under "Other devices"). Right-click it and choose Properties . Go to the Details tab. Select Hardware Ids from the dropdown menu. Copy the top string (e.g., PCI\VEN_8086&DEV_1C3D ). After you fix the PCI Serial Port, back
If the port still appears missing, it could be the Intel Active Management Technology (AMT) driver, also found under the Chipset category. Find PCI Serial Port (usually under "Other devices")
Use or download Intel Chipset + Management Engine drivers from Lenovo’s support site for your exact model. That will resolve the “PCI Serial Port” missing driver on Windows 10 64-bit Lenovo systems.