Apple mobile Device failed to start. Verify you have sufficient privilege to start system"

Does this problem occur when you try to connect a (mobile) device?

See this support document for restarting the AMDS. How to restart the Apple Mobile Device Service (AMDS) on Windows - Apple Support

Also, verify that you removed and reinstalled iTunes using these directions. Failure to follow them can produce additional problems. If necessary, remove and reinstall again. Remove and reinstall iTunes and related software components for Windows Vista, Windows 7, or Windows 8 - Apple Support

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.

Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.

If the advice above doesn't resolve things you could try this alternate version:

iTunes 12.1.0.71 for Windows (64-bit - for older video cards) - itunes64setup.exe (2015-01-28)

which is a 64-bit installer for the 32-bit version of the core application, similar to previous 64-bit releases.

Or roll back to the previous build:

• iTunes 12.0.1.26 for Windows (32-bit) - iTunesSetup.exe (2014-10-16)
• iTunes 12.0.1.26 for Windows (64-bit) - iTunes64Setup.exe (2014-10-16)

tt2

You're welcome. 🙂

tt2

Thank you so much for the suggestion and link to roll back to earlier version.....IT WORKED! Now I-tunes is asking me if I want to upgrade to newer version, I am afraid too, any thoughts? Did I say THANK YOU?

The latest builds of iTunes can be found in the further information area of the user tip.

Apple Software Update or the iTunes download page are likely to offer the full 64-bit setup package, and the latest version may run OK for you. If not you can access the new "for older video cards" version there.

There is no need to update unless you have an issue that has since been resolved (12.1.1. is supposed to sort out some audio playback and Outlook sync issues) or you want a newly released feature.

tt2

Thanks a lot. This helped me of rolling back to previous version, i had spent the entire day of looking through several forums and nothing worked out.

The alternate version worked. Thanks!

I'm not going to update this software for some time now.

You're welcome. 🙂

tt2

Thank you so much!!

After several hours of total frustration your post fixed it. I used itunes64setup.exe(2015-01-28)

Glad to hear you got it working. 🙂

Hopefully you can at some point update to a more recent build without the same problems.

tt2