Appcrash after installing itunes 12.1.1.4. Program won't open

Question

I have been running itunes on this PC for some time with no problems.  After installing the most recent update, itunes crashes and won't open.  I have tried running as administrator and have uninstalled all Apple software and did fresh installs.  All to no avail.  Here is my error information:
  Problem Event Name:    APPCRASH
  Application Name:    iTunes.exe
  Application Version:    12.1.1.4
  Application Timestamp:    54de1991
  Fault Module Name:    CoreAudioToolbox.dll
  Fault Module Version:    7.9.9.6
  Fault Module Timestamp:    54ddd41b
  Exception Code:    c000001d
  Exception Offset:    00000000001fa332
  OS Version:    6.1.7600.2.0.0.256.1
  Locale ID:    1033
  Additional Information 1:    766c
  Additional Information 2:    766ce7c83c720b37be52f12645350d2d
  Additional Information 3:    6b95
  Additional Information 4:    6b95366109546ef6cf86035405f46cca
I'd sure like some help with this one!  Thank you.

Answer 1

Entry point errors can often be fixed by deleting the offending dll, then repairing the component it is part of. CoreMedia.dll is part of Apple Application Support.
For general advice see Troubleshooting issues with iTunes for Windows updates.
The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down the page in case one of them applies.
The further information area has direct links to the current and recent builds in case you have problems downloading, need to revert to an older version or want to try the iTunes for Windows (64-bit - for older video cards) release as a workaround for performance issues or compatibility with QuickTime or third party software.
Your library should be unaffected by these steps but there are also links to backup and recovery advice should it be needed.
tt2