The message 'An error occurred during installation of assembly 'Microsoft.VC80.CRT, type='win32', version='8.0.50727.6195', publicKeyToken='1fc8b3b9a1e18e3b', processorArchitecture=...' may occur because a particular library file is not included in the distribution package supplied with iTunes or won't install for some unspecified reason. Installing the Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package MFC Security Update before attempting to reinstall iTunes may help.
The SMSMSE installer is unable to install the Microsoft Visual C 2008 SP1 Redistributable binaries. These libraries are packaged into the SMSMSE installer. During the 'Registering Product Information' section of the install process the SMSMSE installer 'finalizes' the installation of the Microsoft runtime libraries.
See Troubleshooting issues with iTunes for Windows updates for further advice if required.

Installation Of Assembly Microsoft Vc80 Crt
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Microsoft Vc80 Error
Jun 21, 2016 11:07 AM