iTunes Installation error: "Microsoft VC80.CRT.TYPE="win 32".version=8.0.50727.6195".publicKeyToken='1fc8b3b9a1e18e3b".processorArchitec ture "x86"".Please refer to help and support for more information. HRESULT:0X800700C1

I had the same problem, but was able after TWO DAYS of trying to finally get the newest iTunes installed on my system. It was a nightmare. The short version is you need to install the Microsoft Visual C++ 2005 Redistributable and then update it with a security update. Here is my situation:

1. I have an old laptop, with an intel i5 450M processor and the first-generation Intel HD graphics. So, due to the naming of the "for older video cards" file, I assumed it was a video card problem. It was not.
2. The normal 64-bit iTunes (version 12.6) would not install. I got the following error every time:
   An error occurred during the installation of assembly 'Microsoft.VC80.CRT.type="win32",version="8.0.50727.6195".publicKeyToken="1fc8b 3b9a1e18e3b".processorArchitecture="amd64". Please refer to Help and Support for more information. HRESULT:0x80073715
3. Yes, I could have installed the older 12.5.x "for older video cards" package, which DID install fine--but this was not an option for me because I needed the latest version to be compatible with my iTunes library, which I sync to my desktop. (My desktop uses 12.6 and therefore is not readable by the older version of iTunes.)

After extensive research online, I found a clue on this page:
Troubleshooting issues with iTunes for Windows updates

Search the page for "Microsoft.VC80.CRT" and you'll see a helpful paragraph about fixing it. It's helpful but not quite complete. Here's what I learned that you need to know:

1. You HAVE to install the 2005 package. There are later packages out there, such as 2015; don't be confused. You need 2005. So, I downloaded and installed the Visual C++ 2005 Redistributable 32-bit version:
   https://www.microsoft.com/en-us/download/details.aspx?id=3387
2. Then downloaded and installed the Visual C++ 2005 Redistributable 64-bit version:
   https://www.microsoft.com/en-us/download/details.aspx?id=21254
3. I do not know whether you need both of the above. You probably only need the 64-bit one. I did both.
4. Now that the package is installed, you have to install a security update for it, named the "Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package MFC Security Update":
   https://www.microsoft.com/en-us/download/details.aspx?id=26347
5. This provides a confusing choice of three files to download. I downloaded all three, because there are NO INSTRUCTIONS to help. One, the "I64" one, did not work on my laptop because my laptop AMD rather than Intel. But the other two installed and worked fine. One was for 32-bit and one for 64-bit. Since I installed both versions above, I installed both updates.

Now I installed the full 64-bit, up to date version of iTunes (12.6 as of the time of this writing) and it WORKED!!!!

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. Right-click on the setup file and run the installer as administrator. It may also help to pre-install the Microsoft Visual C++ 2005 Redistributable. In some cases you may also need to disable any non-Microsoft anti-virus software while installing.

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, or want to revert to an older version if the current one won't work properly for you at the moment.

Your library and device backups should be unaffected by these steps but there are links to backup and recovery advice should it be needed.

tt2

This also helped me, I was running into some issues installing Microsoft Visual C++ so I used Little Registry Cleaner and removed several errors, I was then able to install both as well as their security updates and finally successfully able to install iTunes. Thank you so much for your help!

Hi M2i7guel,

Welcome to Apple Support Communities.

It sounds like there is an issue installing iTunes and other Windows updates on your PC. The article linked below provides troubleshooting suggestions that will resolve most issues like the one that you've described.

Issues installing iTunes or QuickTime for Windows

http://support.apple.com/kb/HT1926

I hope this helps.

-Jason

I have this same issue and have done all of the things that it says to do and it still hasn't been able to download.

I had the same issue in Windows 10 which I upgraded to recently and this page solved it:https://discussions.apple.com/thread/7164838

I installed the third option that hhgttg27 mentioned and I was able to download iTunes and it is working fine.

Despues de matarme buscando la solucion, es muy simple, al abrir el instaladaor, desmarquen las opciones de crear como reproductor de audio predeterminado y desmarquen crear icono en el escritorio, eso hara que el itunes instale normalmente sin que salga este error (error vc80.crt ...)
de nada 🙂

This solved my issue. Thank you for the tip!

I, too, ran into this problem recently and after trying all the suggestions mentioned here

(nothing worked) I had to experiment on my own.

I followed the suggestions provided in this link and it took care of my problem:

Mine is a 64-bit Win 7.

https://forums.malwarebytes.org/topic/141537-problems-with-windows-update-error- code-0x80070216/

Hope this will help someone out there.

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.

When reinstalling iTunes right-click on the installer and run as administrator.

See Troubleshooting issues with iTunes for Windows updates for further advice if required.

tt2

Hi

Just enable the service Windows Modules Installer, and run it. (go to the control panel -> administrative tools -> services; from the list you will find the above service).

That is the correct solution!

Thank you, help me a lot!

Microsoft.VC80.CRT iTunes error on windows (SOLVED) - YouTube

Hi,

Did you get any solution. I am still facing this issue and unable to take a backup of my mobile. hrrr

I am downloading the 12.7.1 the latest software.

Can anyone Please help with a solution.