Recently, the manufacturers of laptops thrown out of most of its devices COM port which is needed for me is only comparable by the laptop. Sort of activity comes through him "fill in" the different PLC, and connect to other devices that support RS-232 standard. So, back to the essence of the problem. On all previous laptops and notebooks colleagues running Windows XP on any of the USB2COM adapter (tested 4 the manufacturer — MOXA, Phoenix Contact, Defender, NoNAME) not had any problems with their work. As well no problems and with a real COM port.
Now, on a more "committed" laptops neither the COM port nor the ability to install a full Windows XP, no, and correct work failed to achieve any one adapter USB2COM.
Maybe someone faced the same problem and already solved it?