Click on the blue link above in my last post, to find out how to set up your device to factory settings.
You can also try to erase the firmware file before you start, to make iTunes download a new copy.
iTunes uses "ipsw" files to restore your iPod or iPhone. If those files are unusable, then try deleting them, renaming them, or moving the file to a different directory. This will cause iTunes to download a new copy of the IPSW. When a restore issue is specific to a user, it is likely due to an unusable .ipsw file. If removing the .ipsw file does not resolve a user-specific restore issue, then the issue is caused by other user-specific security software settings or iTunes preferences. Creating a new user will also cause new .ipsw restore files to be downloaded in the new user. You can find the ".ipsw" files in these locations:
Mac OS X
iPhone |
~/Library/iTunes/iPhone Software Updates
|
iPad |
~/Library/iTunes/iPad Software Updates
|
iPod touch |
~/Library/iTunes/iPod Software Updates
|
Note: The tilde "~" represents your Home directory. |
Windows XP
iPhone |
C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPhone Software Updates
|
iPad |
C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPad Software Updates
|
iPod touch |
C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPod Software Updates
|
Note: If you don't see the Application Data folder, you may need to show hidden files. |
Windows 7 and Vista
iPhone |
C:\Users\[username]\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates |
iPad |
C:\Users\[username]\AppData\Roaming\Apple Computer\iTunes\iPad Software Updates |
iPod touch |
C:\Users\[username]\AppData\Roaming\Apple Computer\iTunes\iPod Software Updates |
Note: If you don't see the AppData folder, you may need to show hidden files. |