how can i remuve error1015

Hi mirela11!

I have an article for you that can help you address this error code in iTunes:

Resolve specific iTunes update and restore errors

http://support.apple.com/kb/ts3694

Check for hardware issues

Try to restore your iOS device two more times while connected with a cable, computer, and network you know are good. Also, confirm your security software and settings are allowing communication between your device and update servers. If you still see the alert when you update or restore, contact Apple support.

Common errors: 1, 10-47, 1002, 1011, 1012, 1014, 1000-1020.

Thanks for being a part of the Apple Support Communities!

Cheers,

Braden