Q: iTunes 12.3 problems

I found a workaround, which should for any version of Windows (Vista, 7, 8, 8.1, and 10):

1) Close iTunes if open

2) Use a program such as 7-zip to open up the iTunes 12.3 executable (e.g. iTunes6464Setup.exe) and extract the following:

• iTunes6464.msi
• AppleApplicationSupport64.msi
• AppleMobileDeviceSupport6464.msi

     NOTE: the names will vary slight for 32-bit OSs

3) Right-click on AppleApplicationSupport64.msi and choose install. If there is a prompt to repair or install then choose repair.

4) Right-click on AppleMobileDeviceSupport6464.msi and choose install. If there is a prompt to repair or install then choose repair.

5) Right-click on iTunes6464.msi and choose install.

Recommendation: Preform these steps of upgrading iTunes after updating all your devices to iOS 9 due a different problem.

Cause: The problem most likely is caused by AppleSoftwareUpdate.msi for 64-bit versions of Windows.

Great! I had this problem, too and you helped! Thanks a lot!

Thanks. Your workaround worked for me!

Looks like AppleSoftwareUpdate.msi may be the problem from looking at another thread. Installing each extracted .msi file in alphabetical order should work to get iTunes installed. If ASU still fails then you could try to reinstall the relevant .msi from a previous installer, or wait for the next one.

tt2

Genius.  Thank you. This worked perfectly.

I solved it by uninstalling of Apple software update acc to instruction from turingtest2, thanks.

Thanks - This worked for me to get around the problem!

Thank you!!! It worked

That worked for me too!

perfect fix! Thanks.

Thanks for the work around. The steps enabled the update to iTunes 12.3.0.44

I have downloaded and installed version 12.3 of iTunes. The App Sore tells me that I need to upgrade to version 12.3. I try to do it again and it does stop in the middle of the download again and again and tells me that my closed iTunes cannot be open while I try to upgrade. What can I do?

un-install asu and then download and install itunes from apple, worked first time

Worked for me on Win 7 Pro x64, thanks!