embedded windows computer

Hello, we are making a custom sports car. All of the vehicle's guages and information are displayed electronically on 2 sets of touchscreens. We are currently using Windows-7 (64-bit) as the operating system running on a PC modified to be powered by the vehicle's battery. We are not happy with the bootup time of the PC everytime the car is turned on. We are looking to change the PC with an embedded computer that would boot up instantaneously when the car is turned on. We would like to be able to run a Windows-7(64bit) Operating System so that we could use the current software that we have developed to run on the Windows-7 (64-bit) OS. You would be required to provide detailed instructions on how to put together an embedded computer with a Windows-7(64-bit) Operating System that would boot up instantaneously when the car is turned on. You will need to provide part numbers, cost per part, where the part can be purchased from, and how to install each part and software to make the embedded computer.