Q: Dell 64 bit pc . Tried updating to latest version.  Error message says Apple mobile device service failed to start. Verify you have sufficient privileges to start system services.  What does that mean?

Hi doywks,

The Apple Mobile Device is a component of iTunes that communicates between your computer and your iPhone or iOS device.  The error message you are seeing "verify that you have sufficient privileges to start system services" has to do with the Windows operating system.  It's possible that you are not logged in as the administrator for your Windows PC.  Or, you may have antivirus software stopping the Apple Mobile Device from running.  

If you are having issues updating iTunes on your PC, follow the steps in the article below.

If you can't install or update iTunes for Windows - Apple Support
https://support.apple.com/en-us/HT201668

How to restart the Apple Mobile Device Service (AMDS) on Windows - Apple Support
https://support.apple.com/en-us/HT203188

I hope this information helps ....

- Judy