Ipad cannot connect to pc.

I've just got an Ipad. When I plugged it in to my pc, nothing happened. The pc did not register it at all.
I've tried to reinstall Itunes and tried to restore the Ipad with no luck. When I put the Ipad in recovery mode the pc find the device, but cannot recognize it. I've tried to install the driver manually, but it said that the driver-file do not have informations about that device. (or something like that)
What to do?