ipod touch not recognized on computer

My computer does not recognize my ipodtouch. I uninstalled and reinstalled itunes, but the computer does not show the ipod. I tried to follow suggestions and find the apple usb driver, but it does not seem to have updated the driver. (The driver is located on the C drive, but the date is not from today's update... it is an older driver and does not open, it asked Open With... ) ERRRR, I'm disappointed that the Ipod Touch was working, and now it's not charging or recognized on the computer.