If you are installing Windows XP 32-bit on older hardware (especially industrial PCs, legacy desktops, or motherboards from the late 2000s), you might see an unknown device labeled in Device Manager with a yellow exclamation mark.
If you post your , I can help you find the exact driver.
This is usually not a standard COM port. It is often a or an internal modem/vendor-specific device that XP cannot identify automatically.
Hi everyone,
SOLVED: How to install PCI Serial Port driver for Windows XP 32-bit
Good luck!