I got this from another Post about the 1602 error, I have tried it and it has certainly started to restore my iPad, fingers crossed.
Anybody out there that is pulling their hair out of the issue with Itunes not recognising the phone, go to Device Manager click on Portable Devices, Right Click on Apple Iphone, click on Update Driver, make sure you select Update Automatically, and then it will install the Apple Mobile Device USB Driver (Please Note this will be displayed in the Universal Serial Bus controllers section). Should then display in itunes, if not restart itunes. Where i was going wrong was i was telling the system to search in the apple drivers folder in C:\Program Files\Common Files, and these would not install due to a conflict with the Windows Picture Drivers. Hope this Helps
My error was 1604, I did two things to fix the issue
1. Turned of Adware Adwatch, not sure if this was the culprit but the only thing different on my PC in a while.
Then I found this from another post.
2.Connect the device to iTunes, confirm that the device is in Recovery Mode. If it's not in Recovery Mode, put it into Recovery Mode.
Restore and wait for error 1604.
When prompted, click OK.
Close and re-open iTunes while iPhone remains connected.
iPhone should now be recognized in Recovery Mode again.
Try to restore again.
If the steps above do not resolve the issue, try restoring using a known-good USB cable, computer, and network connection.
It restored the firmware fine and is just going through the final motions of the data restoration.
i can´t restore my ipad 2 seen i should install ios 5 beta 5. how should i do so i can install it? i have many 1604 or 1603 message.
Nobody here can help you with your errors from installing iOS5, or tell you how to do it. If you're a registered developer you can seek help in that forum; otherwise you'll have to find a 3rd party website (macrumors.com is often full of people seeking help for installing unauthorized betas) or contact the person who gave it to you.
Ps. how can we trust on apple at lion restore should function when not this do that....
I'm not sure what you mean by this. A Lion restore has nothing to do with the OS for the iPad.