Hello, I am having USB CDC device and I want to connect that ie. communicate with the USB. The device which I am using is making CDC services which are required to create a simple serial connection and when I am making use of the Windows xp I wont get such kind of problem for the connection. As I have installed the INF file for the driver installation and as I am not having that for the Windows 7, I am getting the problem. So, if you are having any solution for this, then please provide that to me. Thank you in advance.