You may see an "Internal manager error" when trying to restore or update your iPod using iPod Updater for Windows. If you do, try restarting your computer first and then try restoring or updating again.
If the issue persists after restarting, download and install the latest versions of iTunes for Windows and iPod Updater.
This issue most often occurs when there is a mismatch between the version of iPod Updater being used to update or restore the iPod and the underlying iPod Service installed by a newer version of iTunes or iPod Updater. If you need to use an older iPod Updater, you must first fully remove iTunes for Windows and iPod Service by following the steps in this document. Then reinstall the preferred version of iPod Updater.