Exclusive Download Driver Pci Serial Port 60806a May 2026

A generic Windows inbox serial driver (serenum.sys, serial.sys) does not always correctly initialize the MCS9865, especially in Windows 8/10/11 or Server editions. The "exclusive" driver is required because:

The string “PCI Serial Port 60806a” likely comes from Windows Device Manager showing a missing driver. The 60806a part probably refers to a device ID or subsystem ID, not the model name.

Steps to find the real hardware ID:

The VEN (Vendor) and DEV (Device) codes are what matter.
60806a may be part of the subsystem ID or a misreading of a device ID.

Follow these steps to force the exclusive driver onto the device: exclusive download driver pci serial port 60806a

The exclusive download driver for PCI Serial Port 60806A remains a niche but critical file for legacy systems. To summarize the safe path:

Proactive maintenance:

If you determined your device is Intel-based (Vendor 8086), you do not need a "serial port driver." You need the Intel Management Engine Interface (MEI) Driver.

This is where the confusion happens. Windows sees a serial port, but the driver package is labeled "Management Engine." A generic Windows inbox serial driver ( serenum

For older motherboards (circa 2006–2012), the driver may be part of the motherboard chipset driver pack from: