Can't install iTunes 12.1 on Windows 7 64-bit.

This seems to happen with every fifth or sixth iTunes update, and iTunes is incapacitated until the following update. In this case, the error message is as follows:


An error occurred during the installation of assembly 'Microsoft VC80.CRT .type="win32" .version = "8.0.50727.6195" HRESULT: 0x80070091

ZT desktop computer-OTHER, Windows 7, 60 GB SSHD; 1 TB HD

Posted on Feb 3, 2015 1:39 PM

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45 replies

Aug 6, 2015 10:18 AM in response to cbuck1

No it doesn't. For some reason Apple chose to abandon that one and create a new version of it here:

iTunes 12.2.1 for Windows (64-bit - for older video cards)

https://support.apple.com/kb/DL1816


I'll will try to maintain updated links in the further information and older versions areas of Troubleshooting issues with iTunes for Windows updates.



I asked the mods to remove your email address, it will just get harvested by spammers otherwise.



tt2

Sep 24, 2015 6:03 PM in response to turingtest2

turingtest2,


Following your suggestions, when I execute the line:

msiexec /i C:\AppleApplicationSupport64.msi /l*v "%USERPROFILE%\Desktop\Log_AAS64.txt"


installation begins but when nearly complete, reverses itself and fails to complete the installation with the same two error messages shown or referred to elsewhere in this thread and others:

User uploaded file

User uploaded file


The sole problem appears to be inability to install the 64-bit Apple Application Support program.


Any other ideas?


Thanks in advance.

Sep 24, 2015 6:41 PM in response to 002Frank

The message "An error occurred during installation of assembly 'Microsoft.VC80.CRT, type="win32", version="8.0.50727.6195", publicKeyToken="1fc8b3b9a1e18e3b", processorArchitrcture="amd64" ' " 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.


You could also try the iTunes for Windows (64-bit - for older video cards) installer since you have a 64-bit system.


tt2

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Can't install iTunes 12.1 on Windows 7 64-bit.

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