On my PC laptop running Windows 7, downloaded latest Apple update. Now I get "iTunes install error MSVCR.dll is missing" when I click on iTunes. So I followed directions to uninstall iTunes, Apple Software Update, Apple Mobile Device Support, Bonjour and Apple Application Support. Everything uninstalled except Apple Mobile Device Support. It will not uninstall because it says "iTunes install error MSVCR80.dll missing". So I cannot uninstall nor re-install the latest updates. What should I do?