Don't follow these steps unless an Apple advisor or another support article instructs you to.
OS X
- Disconnect all iOS devices from your computer.
- Quit iTunes.
- In Finder, choose Go > Go to Folder.
- Type
/var/db/lockdownand press Return. - Choose View > as Icons. In the Finder window, you should see one or more files that have alphanumeric file names.
- In Finder, choose Edit > Select All.
- Choose File > Move to Trash. You might have to enter an administrator password.
- Empty Trash to delete the files.
With OS X, you delete the files in the Lockdown folder, but not the folder itself.
Windows Vista, 7, 8, or 10
- Disconnect all iOS devices from your computer.
- Quit iTunes.
- Press the Windows key on your keyboard. If your keyboard doesn't have a Windows key, press the Control (Ctrl) and Escape (Esc) keys on your keyboard.
- Click on the magnifying icon or search field. In the search field, enter
%ProgramData%and press Return. - Double-click the Apple folder.
- Right-click the Lockdown folder and choose Delete.
- Restart your computer and iOS device. If you don't, you might see error "0xE80003" when you reconnect the device and open iTunes.
Windows XP
- Unplug all iOS devices from your computer.
- Quit iTunes.
- Choose Start > Run.
- Type
%AllUsersProfile%and click Run. - Double-click the Application Data folder.
- Double-click the Apple folder.
- Right-click the Lockdown folder and choose Delete.
- Restart your computer and iOS device. If you don't, you might see error "0xE80003" when you reconnect the device and open iTunes.

Learn more
- Learn what to do if you see error 0x80090318.
- Learn what to do if iTunes doesn‘t recognize your iPhone, iPad, or iPod.