iTunes error 7 is a common error. The reasons behind the error are corruptions of registry error are so many. As like broken registry structure, missing files etc.  It will constantly pop-up on the system and makes the system slow. It happens due to improper maintenance of your system. It usually occurs when installation of iTunes is corrupted or removed definite entry in system registry. iTunes or else quick time software should be installed on your system but the major problem is when update fails or any registry entry or system files get corrupt. Sometimes uninstalling and reinstalling of iTunes also fail to determine this issue and all of the software starts working indecently and you will get Windows Error 127.

Reason behind This Error Message 

While installing iTunes or updating iTunes to its latest version you might have seen the below error messages:
  • “iTunes point of entry not found”
  • “Entry Not Found” by “iTunes Error 7 (Windows Error 127)”
  • “iTunes was not installed correctly, reinstall your iTunes Error 7 (Windows Error 127)”

http://www.pcerror-fix.com/itunes-error-7-windows-error-127

This error shows when iTunes has terminated orb failed installation. You can also see the “corefoundation.dll” and other DLL Files that are updated or installed while installing iTunes.

The reason behind these messages is a feature so Apple software, Apple Application Support is corrupted or damaged. It might be possible that some DLL files related with Apple Application Support is corrupted. This service is general for Apple products with QuickTime, iTunes, Mobile Me, and other software uninstalling or reinstalling any other software will never solve this error.

 How to Solve iTunes Error 7 (Windows Error 127)

To solve iTunes Error 7 (Windows Error 127), you may need to uninstall the program by Apple.

In the initial step to fix this error is reinstalling your iTunes. The finest process to remove this error is to add/remove programs from control panel. Just click on Start – Control Panel – Add / Remove Programs and search iTunes. Choose Apple product from the list and uninstall it. Once you found it remove the program to get rid of this error. If you want to restart your system than do not do at this moment, search for the next apple program from the list and uninstall it. Carry on this process until and unless all the apple products are uninstalled. It is a tough method but you need to do it in order to remove the program from your computer. While doing this all the files and setting that need to run. 

As soon as you found that the whole apple product is eliminated, then restart you system for the consequence to take in action. After that, do reinstall the application by downloading the latest version from web.  After installing it the latest version of Apple products still if you are receiving the error message then the last option left with you is to use a PC Repair Tool. This repair tool is specially designed to repair the issues related to your PC. After using this repair tool you will never see the message again in your PC.