Q: My PC Windows 7 says I need to reinstall Itunes because mxvcrxo.dll is missing.  What does this mean and how can I fix it.

The complete error message says:

The program can]t start because MSVCRXO.DLL is missing from your computer.  Try reinstalling the probram to fix this problem.

Itunes seems to be working fine on my IPHONE 4S phone and IPAD.

Thanks for your input.