4 Replies Latest reply: Feb 15, 2010 10:03 PM by b noir
sjc0208 Level 1 Level 1 (0 points)
I bought an iPhone 2 days ago and that's where the trouble began. First, I had iTunes 9, but I couldn't get it sync to my iPhone. I kept receiving a message that said "iTunes was unable to load dataclass information from sync services. Reconnect or try again later." I uninstalled and downloaded iTunes several times, but couldn't fix the issue. Next, I uninstalled iTunes again, along with everything on my computer that I could find related to the program. Now, I can't reinstall iTunes! I get a message saying something about an error that was encountered. I don't know what else to do. I've tried using the Windows Installer Clean-up tool, but no luck there either. Help!

iPhone OS 3.1.3, Acer computer, Windows Vista OS
  • 1. Re: Why can't I install iTunes?!
    Chris CA Level 9 Level 9 (74,870 points)
    I've tried using the Windows Installer Clean-up tool, but no luck there either.

    No luck? So you could not run the Windows Installer Clean-up tool?
    Or you did run it and what?
  • 2. Re: Why can't I install iTunes?!
    b noir Level 9 Level 9 (71,995 points)
    I kept receiving a message that said "iTunes was unable to load dataclass information from sync services. Reconnect or try again later."


    What security software are you running on that PC? Does it include CA products by any chance?
  • 3. Re: Why can't I install iTunes?!
    banderso Level 1 Level 1 (0 points)
    b noir, you mentioned CA software, I found my computer has CA Pest Patrol Realtime on my computer, can this cause problems with installing iTunes on my computer?
  • 4. Re: Why can't I install iTunes?!
    b noir Level 9 Level 9 (71,995 points)
    I found my computer has CA Pest Patrol Realtime on my computer, can this cause problems with installing iTunes on my computer?


    That's an interesting possibilitity, b. I've been associating CA security products in recent times with sjc's "sync services" error message, certain kinds of Store display issues (A "broken HTML" effect), and iPhone/Touch software update failures. Can't think of a confirmed case yet of it interfering with an iTunes install, but the sort of "different registry key problem every time" you've been reporting on your iTunes installs has a antivirus/antispyware-interference feel to it. (That's why I was sort of hoping that disabling your McAfee had had some impact.)

    So if you're not using the Pest Patrol, I think it might be worth trying the experiment of uninstalling it and trying one more attempt at a 9.0.3.15 install.