Hi I have recently bought new HP 7400c scanjet. I had also got a new laptop. At the time of purchase it came pre-installed with Windows XP home Edition. I had upgraded the same to Windows 7. After that there is a issue with the printer. I am not able to find a working driver for the system. I tried to install the xp drivers on the same but that is not working. Can anyone help me to get rid of this problem. Windows just detect it as a unknown devices.