Is this a brand new iPad that you're trying to initialise or have you connected the iPad to your PC before? What does the iPad show on the screen??
One solution, if you've connected before and this is a new problem is to turn the iPad off completely by holding down the Power button for a couple of seconds and then sliding the control on the screen to confirm you want to shut down. When the screen has gone completely blank, hold the Power button again until the white Apple logo appears and then wait for the iPad to power up.
But get back to us if this doesn't solve the problem or if I misunderstood what your question was.
Tim
Scotland