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The aim of this user tip is to provide iTunes removal and repair steps along with related advice all in one place, and to help avoid a complete reinstallation where it is not necessary. The key steps are in various boxes below. Some may not apply to your computer, but if they do you may save yourself some work over the full removal and reinstallation instructions given in the second box. Scroll down or click the further information link for additional help with installing or fixing any post-install problems, or review the list of support documents at the end in case one of them may help you.
- iTunes launch errors caused by QTMovieWin.dll
- Removing and reinstalling iTunes and other software components
- iTunes launch errors caused by iAdCore.dll
- Install missing components
- Further Information
- Support Documents
|iTunes launch errors caused by QTMovieWin.dll|
Open the folder C:\Program Files\iTunes (32-bit systems) or C:\Program Files (x86)\iTunes (64-bit systems).
Check for a file with the name QTMovieWin.dll in the above locations only - if found delete it.
Start iTunes. If it runs normally there is no need to repair your iTunes installation at this stage.
Applies to errors such as:
- Entry point not found: videoTracks@QTMovie@@QBE?AV?$Vector@V?$RefPtr@VQTTrack@@@***@@$0A@VCrashOnOverf low@@***@@XZ could not be located in the dynamic link library C:\Program Files(x86)\Common Files\Apple\Apple Application Support\WebKit.dll
The general troubleshooting advice when iTunes fails to install properly (and reinstalling or repairing it does not work) is to remove not only iTunes but all related components, reboot, remove the target installation folders and reinstall.
|Removing and reinstalling iTunes and other software components|
If applicable, disconnect any iPod or iOS device and close Microsoft Outlook.
Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later).
Remove all of these items in the following order:
Reboot your computer.
Delete any of the following folders where they can be found: (see note 3)
also on 64-bit systems:
and where C:\ may need to replaced with the drive letter of your system drive if different.
Download the iTunes setup file and run it to install. Use an account with administrative rights. This can usually be achieved by right-clicking on the downloaded file and selecting Run as... or Run as Administrator. In some cases a combination of Shift or Ctrl keys may be required for the option to show, or it may not be necessary.
If you deleted the iCloud Control Panel and reinstalling iTunes doesn't automatically reinstall it visit DL1455: Cloud Control Panel 4.0 for Windows (7 or 8). iCloud support for Windows Vista appears to have been dropped. See DL1687: Cloud Control Panel 2.1.3 for Windows Vista for an archived version of the relevant support document. There is no available download.
Some users may need to go through the above process more than once before it is successful.
Some users have found that Apple Mobile Device Support or Apple Application Support will not uninstall. Running a repair session from add/remove programs or the programs and features control panel, then trying to uninstall again may work around this issue. Some users have successfully completed the reinstallation of iTunes without removing these components. Alternatively the Microsoft Program Install and Uninstall Utility (MS Installer "Fixit") may help. Third-party AirPrint support services may also prevent Bonjour from being removed. If so these should be uninstalled first. It may also help to temporarily disable anti-virus software and/or the Windows User Account Control feature (Turn UAC on/off) while repairing software. See also HT201999: iTunes for Windows: Background processes installed on Windows XP, Vista, and 7 for a list of processes that might need to be halted while attempting to uninstall components of iTunes.
MobileMe is a discontinued service and the control panel should be removed if present. Not doing so could cause Microsoft Outlook to freeze and/or issue error messages. See HT2992: MobileMe: Uninstalling the MobileMe Control Panel for Windows for details (archive copy). The Microsoft Program Install and Uninstall Utility (MS Installer "Fixit") may be able to remove MobileMe if you cannot find an entry to uninstall.
The utility Unlocker may be able to reveal which processes are preventing you from deleting folders and either close the locking handle or force delete the folder. Autoruns is another useful tool for identifying and selectively disabling start-up processes. You may also find that you can delete the files or folders in question if you reboot the computer into Safe Mode.
|iTunes launch errors caused by iAdCore.dll|
Open the folder C:\Program Files\iTunes (32-bit systems) or C:\Program Files (x86)\iTunes (64-bit systems).
Check for a file with the name iAdCore.dll in the above locations only - if found delete it.
Windows Vista & later: Open the Programs and Features control panel, select iTunes and click Repair.
Windows XP: Open the Add or Remove Programs control panel, select iTunes, then Change... Repair.
Applies to errors such as:
- The procedure entry point ADiAdID_AquireMatchSlotIfNecessary could not be located in the dynamic link library iAdCore.dll
|Install missing components|
For reasons that are unclear the iTunes installer may fail to install or update specific components such as Apple Application Support or Apple Mobile Device Support, even when undertaking a "clean" install such as that described above in Removing and reinstalling iTunes and other software components. In such cases it may help to extract the individual components from the downloaded iTunesSetup.exe, itunes6464setup.exe or iTunes64Setup.exe file using a utility such as 7-Zip, then install the appropriate .msi file for the missing/outdated component.
Even when such components won't install the standalone installer may provide useful error messages that were suppressed during the initial attempt. You can also try removing everything once more then installing the individual .msi components in alphabetical order however the iCloud component should only be installed on Windows Vista. Windows 7 & 8 users should download that from DL1455: iCloud for Windows.
Applies to errors such as:
- Apple Application Support was not found. Apple Application Support is required to run iTunesHelper. Please uninstall iTunes, then install iTunes again. Error 2
If you have difficulty downloading the iTunes installer file try; unticking the "Keep me up to date..." box, clearing your browser's cache, changing pop-up blocker settings, using an alternate browser, or using these direct links:
- iTunes 18.104.22.168 for Windows (32-bit) - iTunesSetup.exe (2015-04-09)
- iTunes 22.214.171.124 for Windows (64-bit) - iTunes6464Setup.exe (2015-04-09)
- iTunes 126.96.36.199 for Windows (64-bit - for older video cards) - itunes64setup.exe (2015-04-09)
Use the last version above if, on a 64-bit version of Windows, you see the following alert when you start iTunes, or as a workaround if there are problems after installing iTunes6464Setup.exe such as crashes on launching iTunes, stuttering playback or loss of AirPlay. This last build is similar to releases of iTunes for 64-bit Windows prior to iTunes 12.1, being a 64-bit installer for the 32-bit core program.
See DL1784: iTunes 12.1.2 for Windows (64-bit — for older video cards) for more information.
The uninstall and reinstall process will preserve your iTunes library and any iOS device backups. You should check your preferences after reinstalling to make sure nothing has changed. Ideally you would backup the library and your other important personal documents and data on a regular basis. See the user tip Backup your iTunes for Windows library with SyncToy for a suggested strategy.
In the unlikely event that content is missing from the library following the reinstallation of iTunes, or you see the error message 'The file "iTunes Library.itl" cannot be read because it was created with a newer version of iTunes', see Empty/corrupt iTunes library after upgrade/crash.
If any of your original media has been deleted from your hard drive, and you don't have a back up, or if you need to change the computer you use to manage your devices, see Recover your iTunes library from your iPod or iOS device.
Should you get "An internal error occurred" warning when reinstalling try creating a new user account with administrative rights and installing iTunes using that account.
For "Could not open key/write value" errors when reinstalling try b noir's user tip:
The technique can be applied to the branch of the registry mentioned in the error message.
For "Object already exists" or "Access denied" errors when installing try opening Control Panel > Programs and Features > View installed updates then checking for Security Update for Microsoft Windows (KB2918614). Uninstall if you have it, then reboot and try installing again.
For "Key not valid for use in specified state" errors try moving the folder RSA from C:\Users\<User>\AppData\Roaming\Microsoft\Crypto\RSA to say C:\RSA (just in case there should be a need to restore it) then try installing again. This folder appears to act as a cache and should be rebuilt automatically as required.
For "Invalid Drive" errors when uninstalling or reinstalling try b noir's user tip:
It may help to disable the real-time scanning component of any antivirus software during the reinstallation of iTunes.
If you followed Apple's guide and have a small collection of .dll files on your desktop these can be safely deleted.
Should you find that all of your desktop shortcuts have turned into links to the iTunes application download and apply the lnk registry fix from www.sevenforums.com/tutorials/19449-default-file-type-associations-restore.html.
For device connectivity issues see HT204095: iPhone, iPad, or iPod not recognized in iTunes for Windows and HT204089: iTunes 10.5 and later: Troubleshooting iTunes Wi-Fi syncing.
If you are unable to get the current version of iTunes to work on your computer you may wish to try reinstalling a previous build from the links below, or an older version from OldApps.com after going through the removal steps once more. In order to roll back to an older version of iTunes you may also need to restore the pre-upgrade library as described in Empty/corrupt iTunes library after upgrade/crash. Having rolled back to an older build on the first run it is likely to tell you there is a new version of iTunes, tick "Do not ask me again" and then click "Don't Download" to avoid reminders until you choose to upgrade again. Some users have also reported success with using System Restore to revert to a pre-upgrade snapshot of their system.
- iTunes 188.8.131.52 for Windows (32-bit) -iTunesSetup.exe (2015-02-18)
- iTunes 184.108.40.206 for Windows (64-bit) - itunes6464setup.exe (2015-02-17)
- iTunes 220.127.116.11 for Windows (64-bit - for older video cards) - iTunes64Setup.exe (2015-02-18)
- iTunes 18.104.22.168 for Windows (32-bit) - itunessetup.exe (2015-01-28)
- iTunes 22.214.171.124 for Windows (64-bit) - itunes6464setup.exe (2015-01-28)
- iTunes 126.96.36.199 for Windows (64-bit - for older video cards) - itunes64setup.exe (2015-01-28)
- iTunes 188.8.131.52 for Windows (32-bit) - iTunesSetup.exe (2014-10-16)
- iTunes 184.108.40.206 for Windows (64-bit) - iTunes64Setup.exe (2014-10-16)
- iTunes 220.127.116.11 for Windows (32-bit) - iTunesSetup.exe (2014-09-09)
- iTunes 18.104.22.168 for Windows (64-bit) - iTunes64Setup.exe (2014-09-09)
See also http://support.apple.com/downloads/#itunes for selected older versions of iTunes.
In addition, it is worth noting that iTunes no longer relies on QuickTime in the way that it used to. Unless you have some obscure file formats that still require QuickTime support you may prefer to remove this component from your system while uninstalling other items as part of the repair process. If it isn't removed it may need repairing from the control panel after you have reinstalled iTunes. Conversely, if you removed QuickTime and find that some older content no longer plays then try reinstalling QuickTime.
- QuickTime 7.7.6 for Windows - QuickTimeInstaller.exe (2014-10-22)
Related support documents:
- HT2292: Using Msconfig to troubleshoot conflicts in Windows Vista, Windows 7, and Windows 8 (Document retired, archive version)
- HT2992: MobileMe: Uninstalling the MobileMe Control Panel for Windows (Document retired, archive version)
- HT201400: Can't connect to the iTunes Store (Formerly HT2553)
- HT201413: Resolve issues between iTunes and security software (Formerly TS3125)
- HT201561: iTunes: How to re-create your iTunes library and playlists (Formerly HT1451)
- HT201596: iTunes: How to open an alternate iTunes Library file or create a new one (Formerly HT1589)
- HT201625: Back up your iTunes library by copying it to an external drive (Formerly HT1751)
- HT201632: Updating the drivers on your Windows PC (Formerly TS1768)
- HT201668: If you can't install or update iTunes for Windows (Formerly HT1926/TS3074)
- HT201751: How to enable iTunes in Windows Vista, Windows 7, and Windows 8 firewall (Formerly HT2553)
- HT201999: iTunes for Windows: Background processes installed on Windows XP, Vista, and 7 (Formerly HT3960)
- HT203175: iTunes for Windows XP: Troubleshooting unexpected quits, freezes, or launch issues (Formerly TS1421)
- HT203185: iTunes: About the "A secure network connection could not be established" alert (Formerly TS1470)
- HT203188: How to restart the Apple Mobile Device Service (AMDS) on Windows
- HT203206: iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issues (Formerly TS1717)
- HT203225: No content shows up in iTunes after updating (Formerly TS1967)
- HT203242: iTunes for Windows: Optical drive is no longer recognized, or "Disc burner or software not found" alert after install (Formerly TS2308)
- HT203256: iTunes for Windows doesn't open after upgrading in Windows Vista, Windows 7, or Windows 8 (Formerly TS2363)
- HT203288: iTunes creates an empty library file in Windows (Formerly TS2715)
- HT203300: Troubleshooting Sync Services on Windows with Microsoft Outlook 2003, Outlook 2007, or Outlook 2010 (Formerly TS2776)
- HT203345: iTunes: Downloading iTunes for Windows using Internet Explorer (Formerly TS3212)
- HT203356: Tunes: May become unresponsive when connecting iPhone, iPad, or iPod touch
- HT203361: iTunes: Advanced iTunes Store troubleshooting (Formerly TS3297)
- HT203367: iTunes for Windows: "Registry settings" warning when opening iTunes (Formerly TS3299)
- HT203395: iTunes: Troubleshooting issues with third-party iTunes plug-ins (Formerly TS3430)
- HT203460: "Could not open key" message when installing iTunes or Apple components for Windows (Formerly TS3767)
- HT203822: iTunes: Troubleshooting AirPlay and AirPlay Mirroring (Formerly TS5209)
- HT204089: iTunes 10.5 and later: Troubleshooting iTunes Wi-Fi syncing (Formerly TS4062)
- HT204095: iPhone, iPad, or iPod not recognized in iTunes for Windows (Formerly TS1363/TS1538)
- HT204275: Remove and reinstall iTunes and related software components for Windows Vista, Windows 7, or Windows 8 (Formerly HT1923)
- HT204313: Remove and Reinstall iTunes and other software components from Windows XP (Formerly HT1925)
- HT204542: iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert (Formerly TS2690)
- HT204550: If you see error 0x80090318 when you try to open the iTunes Store (Formerly TS4123)
- HT204554: iTunes for Windows: Troubleshooting missing menus and text in iTunes (Formerly TS4338)
- PH20366: iTunes 12 for Windows: If you have trouble playing music or other audio
- TS1362: iTunes and QuickTime for Windows: Audio does not play or plays incorrectly (Document retired, archive version)
- TS3543: iTunes for Windows: Text may appear incorrect if font DPI is not set to 96 DPI (Document retired, archive version)
- TS3704: "The feature you are trying to use is on a network resource that is unavailable" alert appears when removing Apple software in Windows (Document retired, archive version)
- TS5376: iTunes 11.1.4 for Windows: Unable to install or open (Document retired, archive version)