Errors occurred during installation before Itunes could be configured. Your system has not been modified. To complete the installatoin, run the instaler again. Click Finish to exit the installer. I've tried re installing iTunes 11.1.1 multiple times and I've redownloaded the file. Has this happend to anyone? If so what was the resolution to fix it? Thank You [:
iPod touch (5th generation), iOS 7
Had this issue, and none of the solutions above worked, here is what I did to fix the issue, Install Itunes like you normally would, admin rights ect. When you get the error message "Itunes errors occurred during installation before itunes could be configured" do not click finish, leave that folder up, no navigate to your appdata directory such as example C:\Users\Your Username\appdata\local\temp, inside there look for a file called iTunes64Setup.log or iTunes32Setup1850.log, open that up and scroll down, look for these key things as in example, "Executing: "C:\windows\system32\msiexec.exe" /i "C:\Users\Crusisxx\AppData\Local\Temp\IXP593.TMP\iTunes64.msi" INSTALL_SUPPORT_PACKAGES=1" so I would navigate inside the folder in my temp called "IXP593.TMP, there you will find all the installation packages, copy all of those files and paste either on your desktop or a new folder ect, once done you can now click finish on the failed itunes installer, now whether or not where ever you decided to place your files you copied from that temp folder you will want to run Itunes64.msi or Itunes.msi ect, and run the installer, you should now have successfully of installed Itunes.
Downloading and installing an older version seems to be the only solution I can do. Also, caferider's answer also helped. Thank you all so much for the help.
I had the same problem for a while, what worked for me was running the setup as administrator.
Itunes 11.1.1 Errors occurred during installation...
