I had a bad crash and freeze up while downloading 4.2 iPhone update. Long story short, I had to go the the Apple Store and have them reinstall the software on my iPhone. Now, when I try to sink my iPad in itunes, it won't recognize it. I have done EVERYTHING to make it work, including uninstalliing itunes and 6 other files, and reinstalling them. I have turned my computer OFF and unplugged it. I have rebooted my ipad. I can bring it up in itunes on my friends computer and at the Apple Store, but not at home on my computer. ANy help would be so appreciated.