iPhone and iPad not connecting to computer

I am no longer able to connect my iPhone, nor my iPad, to my computer; they are not recognized when I connect them via the USB. I have tried to update my drivers and I do not show the driver under the USB section on Device Manager. I have tried to run the "%ProgramFiles%\Common Files\Apple\Mobile Device Support\Drivers" prompt and install the driver as directed, but still nothing. Please help!!!!