iPad Air 1st gen,ios 8.4 update failure, stuck in recovery mode, device not recognized by itunes
I was updating the ios to 8.4 on my iPad Air 1st Gen today. I downloaded the update through itunes, but the install failed. my iPad is now stuck in recovery mode, and not recognized by itunes. I have tried the usual hard reset to factory install on the ipad and it just goes back to the recovery mode screen asking me to connect to itunes. So I connect it again and try to recover through itunes, but it still does not recognize my ipad. I shut everything down and tried again with the same result. I uninstalled all apple software and then rebooted my PC and installed Itunes again from the website. Rebooted again. Then tried to recover through the new installation of itunes. Yet I am still not recovered. I am still stuck in recovery mode with the device not recognized by itunes.
it makes a great paperweight but that is not what I bought it for. Please advise on a solution.
iPad Air, iOS 8.4, Windows 8.1 64 bit PC