I have a NXT 2.0 and a Dell Inspiron 1545 Laptop running Windows 7. When I try to connect I get the error code (most of the time) and no connection. I have read the explanation posted in 2009, but don't know how to find the virtual serial ports mentioned or how to get around the problem. Until then I am stuck with USB cable.
Does anyone know a solution to this? Dell points at The NXT driver and Lego points at Dell.