Bought VMSpc about 4 weeks ago and have not been able to get it to work. Basically when I go into connections on COM3 it says it tries to start but fails to connect "failure jib to pc". I have a 1998 Fleetwood Discovery. I am using Windows Vista Home Premium edition and version 2.3 of VMSpc. I have a Seriel to USB connnection. The led lights on the VMSpc are working and all connections have been checked and double checked. I suspect it is the serial usb cable. When jib is off, see green light on and red light slow flashing(every 5 sec). When engine on, green light is on, and red light flashes rapidly. So any ideas as to what is not working here? Or suggestions for the right usb/serial cable. I have a HP laptop. Thanks, Ken Hudson

Updating from Windows 8 to 8.1 is like a First Time Install. You will need to Disable the Unsigned Device Driver Detection, and Install the VMSpc Device Drivers with the Device Driver Install Helper Program.

YouTube Videos for some Step-by-Step directions: Disable the Unsigned Device Driver Detection, for Windows 8. Disable the Unsigned Device Driver Detection, for Windows 8.1.