After installing Windows 10 on the first machine, Priya opened . Everything looked fine — except for one ominous yellow triangle next to “PCI Serial Port” under “Other devices.”
She manually pointed Windows to the .inf file. Windows rejected it: “The driver is not intended for this platform.” pci serial port driver windows 10
Windows 10 saw this AMT serial controller but had no built-in driver for it. The actual PCI serial card she installed? It was working fine — just listed under “Ports (COM & LPT)” as something else. After installing Windows 10 on the first machine,
That was the clue. Priya opened the PC case and checked the motherboard. It was an Intel Q170 chipset — business-class, with vPro and AMT. The “PCI Serial Port” in Device Manager wasn’t the add-on serial card at all. It was a hidden internal serial-over-LAN interface used by IT administrators for remote management. The actual PCI serial card she installed