: Recent versions of Windows 10 (1709 and later) have been known to find the correct driver automatically if you right-click the "PCI Serial Port" in Device Manager and select "Update driver". Intel Chipset Software : It is highly recommended to install the Intel Chipset Device Software
Before we fix the problem, it is helpful to understand what the problem actually is. When you see a missing "PCI Serial Port" driver in Windows 10 on a Dell OptiPlex 780, it is almost always a case of mistaken identity.
with often results in a "PCI Serial Port" appearing with a yellow exclamation mark in Device Manager . This occurs because Windows 10 does not always automatically include the legacy drivers for the Intel Management Engine Interface (MEI) used by this model. Understanding the PCI Serial Port Driver OptiPlex 780
Finding the correct PCI Serial Port driver for a Dell OptiPlex 780 on Windows 10 is often a journey of bridging the gap between legacy hardware and a modern operating system