my iphone will not restore - user message 21
When I try to restore my iPhone 4, I get a failure message with (21). I've turned my anti-virus software to do this - can anyone help?
iPhone 4
http://support.apple.com/kb/TS3694?viewlocale=en_US&locale=en_US#error21
These errors typically occur when security software interferes with the restore and update process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.