Found, it was the IR receiver, I did not know my PC had this device, since I do not have a TV tuner
After installing Windows 8 Pro 64bit on my XPS One 2710, I am missing the driver for this device:   Hardware ID: ACPI\VEN_FIT&DEV_0002ACPI\FIT0002*FIT0002   on: Controller LPC per chipset Intel(R) H77 Express - 1E4A
Missing driver for Windows 8