Q: Runtime error R6034

Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (Later)

Remove all of these items in the following order:

• iTunes
• Apple Software Update
• Apple Mobile Device Support
• Bonjour
• 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.

See also HT1925: Removing and Reinstalling iTunes for Windows XP or HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8

Should you get the error iTunes.exe - Entry Point Not Found after the above reinstall then copy QTMovieWin.dll from:

C:\Program Files (x86)\Common Files\Apple\Apple Application Support

and paste into:

C:\Program Files (x86)\iTunes

The above paths would be for a 64-bit machine. Hopefully the same fix with the " (x86)" omitted would work on 32-bit systems with the same error.

tt2

Your library is safe from the process, but you ought to be routinely backing up anyway.

tt2

Press the Windows Logo Key and R at the same time. Type in services.msc and press enter. Locate the service and try to halt it. It seems from elsewhere that if you can't get it to uninstall then just press on with the other components and it all comes out OK in the end.

tt2

Great info! Was having the same issue as original poster (also mobile device support not uninstalling) I followed the steps you suggested and everything worked. Thanks for being so helpful so quickly!

You're welcome.

tt2

This worked for me!  Thank you so much ... I was completely frustrated! 

I've been having the same problem.  I tried to uninstall iTunes in this way, but it still comes up with the Runtime error when I attempt it.

EDIT: ...and now iTunes is gone like it's been uninstalled.  Okay, then; never mind.

Message was edited by: kgyork1981

Thank you turingtest2... this worked for me too.

Awesome info, thank you ever so much you've cured my problem too !

I'm having this same issue, only when I try to unistall itunes, I get the same runtime error and the uninstall process stops. I'm running Windows 7 and I've rebooted several times, but nothing works. VERY frustrated right now! :/

Try using the slightly more detailed process outlined in HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8. If any component fails to uninstall try moving on to the next step anyway.

tt2

Thanks very much for your help - I could not have fixed my computer without it.  Not sure why an update to Itunes caused so many issues.  You're the best -