12 Replies Latest reply: Sep 15, 2009 1:15 PM by Maneesh Pangasa
Maneesh Pangasa Level 2 (380 points)
Okay I just downloaded iTunes 8.1.1 on my Windows PC and it won't install the update.

Here's what happens I go through the steps of installing the update -- the welcome screen provides info on what iTunes helps you do (work with iPod, iPhone, Apple TV etc and burning and importing audio CDs, plus buying songs from iTunes and video) then asks you to press next, next screen asks if you accept license agreement, select yes and click next. Next screen asks what language you want iTunes installed in (English US) and what location for me its C/Program Files/iTunes

Then press next and on the next screen it will install -- next screen shows up and then jumps directly to the iTunes has installed screen without doing so.

"Says iTunes Installer Completed"

"The installer encounted errors before iTunes could be configured.

Your system has not been modified. To retry these operations at a later time please return to the installer again. Click Finish to exit installer."

I have tried using both Apple Software Update which tells me iTunes + QuickTime could not be verified when the installation error occurs and the manual installation by downloading the file and launching it. Any ideas on
what's causing this?

Windows XP
  • Scottster Level 1 (0 points)
    Can't help you but thought I'd just pile in to say I'm having the same problem. I also suffered a similar issued with 8.0 a while back, and remember resolving that by following some direct-download link posted around these parts.

    Anyway, here's hoping someone from Apple picks up on this thread and provides an answer soon.
  • Maeckxaamn Level 1 (0 points)
    Same problem. Auto-updated locked up when installing iTunes 8.1.1, and I can't get it to manually install either. Same error message you mentioned too.
  • Katrina S. Level 7 (24,095 points)
    Lots of times this is due to QuickTime not installing properly. iTunes depends on QT to play audio & video.

    Try installing QT standalone, first. Make sure you pick the option withOUT itunes.http://www.apple.com/quicktime/download/
    Choose SAVE, not run. Double-click the saved exe file to start the install.

    If QT installs OK, and you can get it to open and run, then try the itunes install again.
    Use this link and again, choose SAVE, not run.

    If you get errors during the QT install, post back.
  • Maeckxaamn Level 1 (0 points)
    Fixed, Thank You.
  • Katrina S. Level 7 (24,095 points)
    You're welcome!
  • Scottster Level 1 (0 points)
    Hi Katrina,

    I downloaded the QT withOUT iTunes, as suggested, and installed this independently. The QT install worked fine.

    However, iTunes 8.1.1 still will not install - the problem is the same as before. The error message simply says: "The installer encountered errors before iTunes could be configured. Your system has not been modified."

    And that's it. I can still run iTunes, though when I launch iTunes I get this error message: "iTunes was not properly installed. If you want iTunes to be able to retrieve CD information from the Internet, you need to reinstall iTunes."

    But as I said, iTunes will actually run okay from here.

    So I'm stumped. Any more ideas?

  • Scottster Level 1 (0 points)
    Ooh... I've just remembered I had a similar problem before and Windows Install Clean Up fixed it previously. Well, it's just fixed it again, so posting this here in the hope it'll help others.

    Basically, follow this: http://support.apple.com/kb/HT1926?viewlocale=en_US

    Worked for me!

  • Katrina S. Level 7 (24,095 points)
    I'm confused, did you already run the Windows Installer Cleanup utility from microsoft?
    And you're still getting this error?
  • Scottster Level 1 (0 points)
    Sorry to confuse. I have now run the Windows Clean Up Installer and all is now fine - the Windows Clean Up Installer fixed the problem, and I am now happily running 8.1.1.


  • Katrina S. Level 7 (24,095 points)
    Glad to hear it - happy listening!
  • Jazzgirl Level 1 (0 points)
    I had the exact same problem. I've been having a problem installing updates for a while. I finally installed the Windows uninstaller utility and uninstalled Quicktime and iTunes. I cleaned out any folders I found. I rebooted and successfully reinstalled both (Quicktime first) without any incident. I have been fight upgrades for months. I hope I don't have to keep uninstalling/cleaning/reinstalling each time.
  • Maneesh Pangasa Level 2 (380 points)
    Okay I got this issue resolved sometime back and just realized I hadn't gone back and marked it as answered. Had to download it manually from Apple's website and perform the update. For some reason at the time I was trying to do the update it wouldn't work with Apple's Software Update application. Software Update works fine though now.