Error -1 when updating iphone 4 to ios6

Hi, new user here. Does anyone have any idea why I am receiving -1 error when trying to update my iphone 4 to IOS6? Any info I can find says hardware problem try another trusted computer. I tried originally through WIFI and received an error. Then I just tried using my laptop with a fresh itunes and still received the error. When I tried with WIFI it would not even start the install. However hooked to my pc and using itunes it did try to install got all the way to verify and then the error popped up. Now it is restoring everything back to original.. Any help would be greatly appreciated.
thank all

Update, Looked at the phone after it restored and it say it's on 6.0. Not sure I have all the features, but it there. Weird.

not wwird at all. on Iphone 4 you will not get all the updates, new features, (No Siri) for one
the is not unteathered jailbreak yet,
I just did the same upgrade,