: If Windows cannot find the driver, right-click the "PCI Serial Port" in Device Manager, go to Properties > Details , and select Hardware IDs . The typical ID for this device starts with PCI\VEN_8086&DEV_2E17 . Manual Installation : Download the Windows 7 64-bit AMT driver from Dell.
The driver you need is rarely labeled "PCI Serial Port Driver" on download sites. You are looking for the . optiplex 780 pci serial port driver