What windows system services are needed for iTunes 12

Question

I recently installed the update for iTunes on my PC.  Something happened near the end of the process:  a dialog box popped up telling me that some of the Windows services were missing from my computer.  I was given three (3) choices: cancel / retry / ignore.  I first tried retry and that didn't work, so I clicked on the ignore option and the installation finished.
Now, I think the missing Windows 7 (64-bit) service was the "Apple Mobile Device" Service.  Unfortunately, I failed to write down exactly what the dialog box said, so there could be other services missing from my computer.  And since I have no way to know when the service/s was/were lost a system restore will not work.

Answer 1

For general advice see Troubleshooting issues with iTunes for Windows updates.
The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down the page in case one of them applies.
The further information area has direct links to the current and recent builds in case you have problems downloading, need to revert to an older version or want to try the iTunes for Windows (64-bit - for older video cards) release as a workaround for installation or performance issues, or compatibility with QuickTime or third party software.
Your library should be unaffected by these steps but there are also links to backup and recovery advice should it be needed.
tt2