Crashes on launch iTunes 12.1

Question

Recently updated my version of iTunes from the automatic update tool and whenever I launch it, it stops working with the error message;
Problem signature:
  Problem Event Name: APPCRASH
  Application Name: iTunes.exe
  Application Version: 12.1.0.71
  Application Timestamp: 54c76235
  Fault Module Name: CoreAudioToolbox.dll
  Fault Module Version: 7.9.9.4
  Fault Module Timestamp: 54940ab1
  Exception Code: c000001d
  Exception Offset: 00000000001fa332
  OS Version: 6.1.7600.2.0.0.256.1
  Locale ID: 3081
  Additional Information 1: fc2e
  Additional Information 2: fc2e2b8279e7e67c3b161ae54734886c
  Additional Information 3: 4b71
  Additional Information 4: 4b7175f103467f04f92de112e03af6d1
Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt
I have tried safe mode loading by holding Left Shift+Left Control while opening and same deal also while using administrator privileges while both opening and installing the program. I also tried to repair it using a new download and .exe file and using the control panel options. Still same prompt.

Answer 1

Those links have become dated. There are up to date ones in user tip. It is important to completely clean out the old installation before trying to reinstall so I'll repost my current boilerplate here.
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 notes below the box include tips on removing troublesome components.
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 installation or performance issues, or compatibility with QuickTime or third party software.
Your library should be unaffected by these steps but there also links to backup and recovery advice should it be needed.
If you still don't have any luck try the process given in Install missing components. If that still produces errors I can show you how to generate a detailed log of the installation which might pinpoint where things are going wrong.
tt2