We’ve responded to a number of calls from clients experiencing issues with the latest iTunes update. This is a known issue with update 11.1.4 released on or around January 22, 2014.
Fortunately, there is a workaround (from the iTunes support forums):
Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later)
Remove all of these items in the following order:
- Apple Software Update
- Apple Mobile Device Support (if this won’t uninstall move on to the next item)
- Apple Application Support
Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.
The uninstall and reinstall process will preserve your iTunes library and settings.
Some users may need to follow all the steps in whichever of the following support documents applies to their system. These include some additional manual file and folder deletions not mentioned above.