Driver Communication Port Com1 [ Best × PICK ]

If still missing, your motherboard may not have a native serial port (common in modern laptops), requiring a USB-to-Serial adapter. 2. Install or Update the COM1 Driver If the port has a yellow exclamation mark or isn't working: Right-click in Device Manager . Select Update driver > Search automatically for drivers .

What is the shown in Device Manager (e.g., yellow exclamation mark)? Driver Communication Port Com1

If COM1 is completely missing, it might be disabled in your computer’s BIOS/UEFI under "Onboard Peripherals" . If still missing, your motherboard may not have

Click at the top menu and select Show hidden devices . If still missing

Right-click it and choose > Port Settings > Advanced . Change the COM Port Number to COM1 .