Fix iTunes Error ADiAdID_AquireMatchSlotIfNecessary iAdCore.dll (Windows Error 127)

The procedure entry point ADiAdID_AquireMatchSlotIfNecessary could not be found in the dynamic link library iAdCore.dll
ITunes error 7 (Windows error 127)

The Windows 127 error is usually triggered if a fault is found within a dynamic link library (.dll) file required to launch a program.
In this case the iAdCore.dll file is corrupt or faulty and is preventing iTunes from loading. To fix this problem, follow the instuctions below:

1. Navigate to the following folder(s).
• C:\Program Files\iTunes (32bit windows)
• C:\Program Files (x86)\iTunes (64bit windows only)

Then find and delete the iAdCore.dll file. If you are running a 64bit windows, be sure to check both folders listed above.

2. Uninstall iTunes from Control Panel > Add or Remove Programs. If you encountered this error during iTunes installation, it is unlikely that you’ll find the program there, so you may skip this step.
3. Completely remove all iTunes related software and components by following the procedure here: iTunes Error 7 – Uninstall iTunes Completely
4. Download the latest version of the iTunes software, then reinstall.

If done correctly, this should replace the deleted iAdCore.dll file with a brand new one and thus get rid of the Windows error 127.