Upgrading to iTunes 7.1.1 - iTunes won't run anymore but no error message

I just downloaded update 7.1.1 and now I cannot start iTunes anymore. I open iTunes and a bar appears which says "Upgrading iTunes library". After showing 3 little bars in the big bar, nothing happens anymore. No error message at all and Quick Time Player seems to run just fine. Any suggestions?

Jason,I used the troubleshooting link you gave and so far have 1.Fixed Digital Signing for Windows drivers.(didn't help) 2.Removing Itunes configuration files.
In this one I was told to delete the SC info.sidb file (I didn't have one of these when I got to the folder where it was supposed to be)The thing I haven't done is the mscofig.instruction. I was saving it for last as it sounded like it could really make a lot of changes to my computer.The Itunes installation icon is still on my desktop so I clicked on it and there was a link that said it would repair missing or damaged files in the Itunes software. It didn't help either. I can click on Itunes all day long and it won't open.I can't access the library either. I am going to do the last step you suggested and uninstall my security software and see if that helps. I appreciate all the help Jason.

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Prompted to upgrade iTunes on computer. Won't let me and get error message MSVVR80.dll not found. Attempted to reinstall, won't let me. Can you have iTunes and iCloud on the same computer?

Prompted to upgrade iTunes on computer. Won't let me and get error message MSVVR80.dll not found. Attempted to reinstall, won't let me. Can you have iTunes and iCloud on the same computer?

Try following the instructions of tt2 in https://discussions.apple.com/thread/5822086

I clicked "yes" to upgrade iTunes and now it doesn't work. I get an error message stating my computer is missing MSVCR80 and then a message stating Error 7 (Windows Error 126). I've tried reloading iTunes twice. What can I do?

I clicked "yes" to upgrade iTunes and now it doesn't work. I get an error message stating my computer is missing MSVCR80 and then a message stating Error 7 (Windows Error 126). I've tried reloading iTunes twice. What can I do?

Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later)
Remove all of these items in the following order:
iTunes
Apple Software Update
Apple Mobile Device Support (if this won't uninstall move on to the next item)
Bonjour
Apple Application Support
Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.
The uninstall and reinstall process will preserve your iTunes library and settings, but ideally you would back up the library and your other important personal documents and data on a regular basis. See this user tip for a suggested technique.
Please note:
Some users may need to follow all the steps in whichever of the following support documents applies to their system. These include some additional manual file and folder deletions not mentioned above.
HT1925: Removing and Reinstalling iTunes for Windows XP
HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8
tt2

Itunes will not connect with the store. I get no error message. The store just won't load on the screen.

Itunes will not connect to the store. I get no error message, the store just won't load.

Have you had a look here,
Can't connect to the iTunes Store
From here
http://www.apple.com/support/itunes/troubleshooting/

ITunes 7.1 won't start, invalid Win32 application error message comes up

I repeatedly tried to download iTunes 7.1 for my new iPod nano on my Windows XP, when the download completes and I try to run the program an error message comes up stating that iTunesupdate.exe is not a valid Win32 application...I have tried erasing iTunes completely then re-downloading it, tried re-intsalling but nothing works. I have been trying to get help for the past month now, no one seems to know anything, this is the last resort please help ASAP.
Thanx a bunch.

okay, let's give this document a try:
iTunes: Windows reports that iTunesSetup.exe is not a "valid Win32 application"

I am trying to remove the older version of iTunes but an error message appears saying that it cannot find the path to 'iTunes64.msi", and I tried the search option to find it on my computer but no such luck. Please help me

I am trying to remove the older version of iTunes but an error message appears saying that it cannot find the path to 'iTunes64.msi", and I tried the search option to find it on my computer but no such luck. Please help me

Go to Microsoft website to fix install and Unistall problems. Click "Run now" from Fix it to remove all iTunes & related installer files:
http://support.microsoft.com/mats/Program_Install_and_Uninstall
Be aware that Windows Installer CleanUp Utility will not remove the actual program from your computer. However, it will remove the installation files so that you can start the installation, upgrade, or uninstall over.

I can't open my iPod library in iTunes, the app doesn't show the device at all, no error message, nothing, but windows 8 opens it like it would a flash drive. It has worked for me before just fine and both have the most updated software versions.

I can't open my iPod library in iTunes, the app doesn't show the device at all, no error message, nothing, but windows 8 opens it like it would a flash drive. It has worked for me before just fine and both have the most updated software versions. HELP PLEASE!

yeah i plugged in my iphone to my computer and itunes does not even notice that i plugged it in.

Please help me on itunes i can't sync my music i keep getting a error message [-69] how do i fix

please help me on itunes i can't sync my music i keep getting a error message [-69] how do i fix

Hi kidjojo,
Welcome to Apple Support Communities.
You may find some helpful suggestions in this article:
iTunes displays a -69 error when syncing iPod
http://support.apple.com/kb/HT1210
Best,
Jeremy

Just downloaded iTunes to new dell laptop, tried syncing my iPhone get an error message: "this iPhone cannot be used because the Apple Mobile Device service is not started". What does this mean? I have had this phone for over a year..

Just downloaded iTunes to new dell laptop, tried syncing my iPhone get an error message: "this iPhone cannot be used because the Apple Mobile Device service is not started". What is the issue, had this phone over a year??

I had this problem before. I like to disable extra services to speed up my computer and I disabled the Apple Mobile Device service and had to re-enable this.
You can do that by going Control Panel>Administrative Tools>Services. Once you have gone to the services window, look for Apple Mobile Device and right-click. Select "Properties". There should be some information about the service as well as the label "Startup Type" with a drop-down menu beside it. If it says "disabled", that is your problem; Change the selection to anything except disabled (Automatic is easier and ensures that you can sync as soon as itunes opens).
If this doesn't work, I would look into your anti-virus' settings. Good Luck!

I am trying to download the latest version of iTunes to my PC (windows XP) and I keep getting an error message or two. One is that it can't uninstall the previous itunes version, the other is that it can't find itunes.msi.

I am trying to download the latest version of iTunes to my PC (windows XP) and I keep getting an error message or two. One is that it can't uninstall the previous itunes version, the other is that it can't find itunes.msi. I have tried removing the old version in add/remove programs, but it says the same error. I tried deleting every thing that has itunes in the file/folder/etc and it didn't help.

(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?

TS5376 I just attempted to update my apple iTunes to 11.1.4 which resulted in the msvcr80.dll error message. I followed all of the instructions above and now I can't get past the Service 'Apple Mobile Divice failed to start. Help!!!

I just attempted to update my apple iTunes to 11.1.4 which resulted in the msvcr80.dll error message. I followed all of the instructions to move the .dll's to the desktop, I removed iTunes via the control panel, and now I can't get past the Service 'Apple Mobile Divice failed to start. Verify that you have sufficent privilidges to start systems services. I now have no iTunes on my laptop, can't reinstall iTunes, and I am pulling my hair out because I can not figure out how to send an e-mail to Apple because I bought my iPad just over a year ago. PLEASE HELP!!!
V/r "TRACER"
CDR Harold W. "TRACER" Valentine, SC, USN

Solving the iTunes Installation Problems in Windows
1. Apple has posted their solution here: iTunes 11.1.4 for Windows- Unable to install or open - MSVCR80 issue.
2. If the Apple article does not fully resolve the problem for you, then try Troubleshooting issues with iTunes for Windows updates - MSVCR80.

I'm trying to sync my Iphone to get some new music but getting error message 'itunes was unable to load data class info'. How do I fix it (my husband's 2 devices work fine on the PC)

I'm trying to sync my Iphone to get some new music but getting error message 'itunes was unable to load data class info'. How do I fix it (my husband's 2 devices work fine on the PC). It's driving me mental and has stopped me putting anything new on for months. Help!!!

http://support.apple.com/kb/TS2690

Itunes wont load on windows 7. I keep getting an error message 0x80071a91. Previously had itunes installed but it wouldnt update, so uninstalled and now cant get it. Any ideas

Help, I previously had itunes loaded onto windows 7, but it wouldnt update, i uninstalled itunes and now when i try to reinstall i get an error message 0x80071a91. Any ideas on how to fix?

Hi Didi221,
Thanks for using Apple Support Communities. This article has steps you can take for the error you're seeing:
iTunes 11.1.4 for Windows: Unable to install or open
http://support.apple.com/kb/TS5376
Cheers,
- Ari

After un-installing Itunes, I am unable to reinstall. I receive the following error message: microsoft.VC80.CRT.type="win32".version="8.050727.6195".publickeytoken="1fc8b3b 9a1e18e3b".processorarchitecture="x86". HRESULT: 0x80070424. Help?

I had Itunes on my PC (Windows Vista, 64-bit) and it worked fine with my Ipod. I purchased an Ipod nano, and it was not recognized by Itunes and I was instructed to un-install and re-install. After un-installing Itunes, I am unable to reinstall. I receive the following error message: microsoft.VC80.CRT.type="win32".version="8.050727.6195".publickeytoken="1fc8b3b 9a1e18e3b".processorarchitecture="x86". HRESULT: 0x80070424.
I am also having trouble with Windows Updates, and receive the same error message: 80070424. Perhaps the 2 issues are related?
If anyone is able to help resolve the issue so I can successfully install Itunes, I would greatly appreciate it!

I ran the sfc /scannow command, and yes the response was: Windows Resource Protection could not start with the repair service.
A broken Windows Modules Installer then. It's a bit of an involved fix getting past it, but we've had success here with it in the past.
First, I'd strongly suggest setting up a system restore point.
Now try the Scenario III treatment from the following document:
Windows Update Error 80070424 in Vista
Head back into Windows Update and attempt to get updates again. If they still fail, this time with an 8000FFFF error code, try the following Microsoft document:
Windows Update error 8000FFFF
If you get Windows Updates flowing again, stock up on any you're behind on (restarting the PC when requested to do so). This may take some time and may have to be done in several batches, depending on how far you've fallen behind. Basically, keep going back to Windows Update until it stops offering you new updates.
After the updates have been installed, restart the PC one more time (in order to ensure that any pending installs requiring a restart have been resolved).
Now try another iTunes install. Does it go through without the 0x80070424 this time?

ITunes failed to respond on my PC and gave me an error message to say a component - MSVCR80.dll - was missing. Never happened before and I have hundreds of tunes, playlists, Podcasts etc. in there somewhere. What is this about? Brian Forster

iTunes failed to respond on my PC and gave me an error message to say a component - MSVCR80.dll - was missing. Never happened before and I have hundreds of tunes, playlists, Podcasts etc. in there somewhere. What is this about? Brian Forster

Try the following user tip:
Troubleshooting issues with iTunes for Windows updates

Upgrading to iTunes 7.1.1 - iTunes won't run anymore but no error message

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