Today when I tried to start Apple iTunes, I was greeted with an error message that said “The program can’t start because AVFoundationCF.dll is missing from your computer. Try reinstalling the program to fix this problem.” When I clicked OK on that box, another one appeared that said “iTunes was not installed correctly. Please reinstall iTunes.”
These messages started appearing after I ran CCleaner on my computer. It’s really not CCleaner’s fault though. The utility was only cleaning out old references to an iTunes plugin I uninstalled months ago called FixTunes. This cleaning left iTunes damaged. If you are experiencing this same problem, it is likely you installed a third-party iTunes plugin that is either uninstalled or corrupted. Consider uninstalling this software if possible.
As for my situation, I tried to find a shortcut to solving this problem, but it seems that you really have to reinstall iTunes in order to get it working again. For some users, going to Control Panel > Programs > Uninstall a program, then selecting iTunes > Repair seems to fix it. This didn’t work for me. I had to download the iTunes installer from the Apple website, then run the installer again.
Once iTunes was reinstalled, things worked well. No more errors and my entire music library was intact.