Something dealing with movie rentals.
QuickTime may be corrupted. You must reinstall it before iTunes will work. Windows users, also try turning off Compatibility Mode for QuickTime
- Right-click on
Program Files (x86)for 64-bit Windows) and choose Properties from the shortcut menu
- In the Properties window, click on the Compatibility tab. Deselect the checkbox labeled "Run this program in compatibility mode for"
- Select "Windows XP"
- Click Apply
- Close the Properties window
Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have the SHSH blob backed up and modify the hosts file to point to Saurik's Cydia Server where they are backed up (or localhost if you have it yourself).