Errror downloading iTunes: Invalid signature

I have been running an old version of iTunes with no problem & have just downloaded the new version 7.6? I got an error halfway thru the download "iTunes has an invalid signature it will not be downloaded". I carried on & the icon installed etc. & Quicktime tells me itunes is installed correctly, but when I try to launch it nothing happens. Has anyone got any suggestions. Tried un-installing & re-installing, running all my system scans & nothing works??

atvrcr500,
Have you tried connecting through a different router? That has solved the "invalid signature" problem for several folks.
Example:
http://discussions.apple.com/thread.jspa?messageID=10652940

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When trying to install update 10.5 it says the download has invalid signature and won't install. I run XP

when trying to install update 10.5 it says the download has invalid signature and won't install. I run XP

I'm having similar problems with 10.5. I managed to install it but when I try to run itunes it doesn't open correctly and when I view my account the screen is not presented in the correct format. When I try to search for music it finds nothing. So I ran the diagnostics option but this came back with an error ' secure link to itunes failed'. It also said that the internet connection was verified but when I went into the help option it said I wasn't connected to the internet but as you can see I was and am. I've now uninstalled and reinstalled 3 times, each time I uninstall I've followed the correct sequence as recommended:-
1. Itunes
2. Quicktime
3. Apple software update
4. Apple mobile device support
5. Bonjour
6. Apple application support
I've noticed now that 'quicktime' didn't get reinstalled, not sure if that's the problem. Also when I rebooted after the last Uninstall I received a new error message ' Applesyncnotifier.exe - unable to locate component'. I've also noticed that my CPU is running at 50% according to task manager when I've got apple loaded, but it goes down to less than 20% when it's uninstalled and even goes down to 0%. Clearly, there are a number of people with similar issues and Apple need to sort it quickly.

HT1926 itunes invalid signature

Somebody please help me! It won't let me download the newest version of itunes. It just it has an invalid signature.

Go directly to Apple link to download
http://support.apple.com/kb/DL1426
Select "Save" instead of "Run". Once downloaded, double click the iTunesetup.exe to install.

ITunes invalid signature upon update

When I try to update iTunes to the latest version 10.5 I keep getting an error message "iTunes has an invalid signature. Download has been removed"
I am using Win7 64 bit desktop.

Hi there arnold0937,
You may find the troubleshooting steps in the article below helpful.
Trouble installing iTunes or QuickTime for Windows
http://support.apple.com/kb/HT1926
-Griff W.

Itunes invalid signature

I'm trying to download the latest version of itunes, actually I've tried downloading several different versions now to no avail. I'm using vista and have tried everything I have came across and nothing works. I have all the latest windows updates. I've tried unblocking after downloading the installer, I've tried downloading from both FF and IE8 and checked the "download even if signature is invalid" box in IE. I've been trying to download for months now and cannot figure out what is wrong or what is left to try. Ultimately I'm wanting to buy an iphone but looks like apple isn't gonna get my money if someone doesnt fix the **** file!

Are you getting this error : Windows reports that iTunesSetup.exe is not a "valid Win32 application
If so check out this article : http://support.apple.com/kb/TS1406
2, more detailed descriptions, of the fix here : http://www.zolved.com/synapse/viewcontent/28312/Itunes_Error__iTunesSetup_exe_is_not_a_valid_Win32applicat
and here : http://hubpages.com/hub/itunes-setup-exe-not-a-valid-win32-application-error
edit : If all else fails have a friend download the latest iTunes/Quicktime and burn it to disk for you.
In addition you may want to use the Windows Uninstaller : http://support.microsoft.com/kb/290301
That should give you the necessary basis for a clean install of iTunes software.
Message was edited by: Pamela Gadsden

Itunes invalid signature 10.6

Hello Apple Community,
I am trying to download an update for itunes and keep getting the same error.
This is the first time this has happened. We bought an iPad recently, could it be because of that? The account is the same.
I have shut down the application and run a diagnotics and then restarted the PC.
If I uninstall and reinstall, will i lose the "profile"?

I have the same problem but the link http://support.apple.com/kb/DL1426 doesn't work. May I have a new link to solved the problem ?

ITunes "Invalid Signature" Error

I have the same problem with upgrading Itunes as so many other members in this forum but I couldnt solve the problem suggested by users in other topics, hence I dont know how to change the internet connection from home to public group connection,,

Ok: Windows Vista 32 with MSE and Windows firewall completely turned off. Using the above suggested method allowed it to download, but brought me to the dreaded "Not Valid Win32 Application" error message. Last week I had spent two weeks fighting to get ver 9.2.0.61 to download and install caught up in this vicious cirlcle of forums, questions, answers, and NO help support. The solution was to download, install and run Malwarebytes to "clean" my computer. Once that was accomplished I was able to completely DL & Install that ver. Also, I am attempting to update my ipod to 4.0 and it won't download either. Very tired of these faulty products.
32 bytes, Microsoft Security Essentials, Malwarebytes, Windows Firewall, discs cleaned and defragged, uninstalled with Revo Pro, then downloaded with Firefox and re-installed with IE8.

When I try to download the latest version of iTunes on my iPod Classic I get the message that "iTunes has an invalid signature" and that "Content was blocked because it was not signed by a valid security certificate. Anyone know how to fix this?

When I try to download the latest version of iTunes from apple.com, I get the message "Content was blocked because it was not signed by a valid security certificate."When I open iTunes and try to download the latest version there, I get the message "iTunes has an invalid signature. The download has been removed." I have also gotten an Internet Script Error stating that an error has occured in Line 0, Char O and that "Access is denied to images.apple.com/global/scripts/lib/iepngfix.htc." This problem has never occurred with earlier versions of ITunes. Anyone know how to fix this problem?

Are you downloading iTunes form an Apple website or somewhere else? If the answer is somewhere else, try downloading it from Apple. Click on iTunes in the black menu bar above and go from there.
Let us know what happens.

HT1926 Trying to download itunes update on my computer windows Xp... Tried 3 times and keep getting an error: invalid signature/will not be installed. HELP

iTunes is downloaded, been using it for years. I went to download an update and I keep getting an error.Error message is: invalid signature/will not install.
I did try to update manually as instructed however that also came with the same error.
If someone can advise it would be greatly appreciated.
So what is an invalid signature and how to fix it???

I would think the link doesn't work now as we are on version 10.7.
If you go to:
http://support.apple.com/downloads
the latest update for itunes is in the left hand column. If you follow the rest of the instructions from wiclee/fimeck it should work.
"Select "Save" instead of "Run". Once downloaded, right click the iTunesSetup.exe or iTunesSetup64.exe and select 'Run as Administrator' to install." (or use default)

Itunes 10.7 wont startup or run on windows 7 64 bit,, while downloading it from previous version of itunes say invalid signatures.

whenever i used to download something from itunes it restarts in mid,, and starts again and does the some for a long time and atlast says error 8008. Then i tried to upgrade it new itunes would download for some time then gives error saying invalid signatures,, I then downloaded itunes 10.7 from apple website.. download completes and it wont run.. wont start up.. I have tried Run as administrator used new user accounts, downloaded it again and again deleted temp folder aswell, deleted itunes library from my music folder aswell, done everything i found in discussions but that wont help,

Apologies about the delay. I've been brooding.
Although we don't know where the specific relevant keys are on modern versions of iTunes, there's a shotgun approach we can take to dealing with them, which has a reasonable chance of success in this case. The complicating factor in your case is that you've got a 64-bit Windows. So there's an extra hoop to jump through.
The basic approach is the procedure from the following weblog entry:
[Solving setup errors by using the SubInACL tool to repair file and registry permissions|http://blogs.msdn.com/astebner/archive/2006/09/04/solving-setup-err ors-by-using-the-subinacl-tool-to-repair-file-and-registry-permissions.aspx]
The complicating factor is that we have to make an additional edit to the reset.cmd file.
When you're in Notepad, replacing the two YOURUSERNAME values with the name of your Windows 7 user account, in the first line of the batch file, replace the:
%programfiles%
... with:
%ProgramFiles(x86)%
(On a 64-bit Windows system, subinacl is installed in a different location than on 32-bit systems. So unless we make that change, the reset.cmd isn't going to be able to find subinacl and the reset.cmd won't work.)
While you're in Notepad editing the file, make sure each of the nine lines of the file start of a new line. (Sometimes they get smooshed up together on a single line, and then again the reset.cmd won't work.)
I'd strongly suggest setting up a System Restore point immediately prior to running the reset.cmd. There's instructions on that in the following document:
http://www.bleepingcomputer.com/tutorials/tutorial143.html#manual

I have Windows 8 on my computer. I have Itunes 10 installed, but I cannot download Itunes 11. An error message says that Itunes has an invalid signature. Can anyone help?

My computer has Windows 8. I keep getting an error message when I try to download Itunes 11----Invalid signature. Can anyone help?

That suggests that the installer is getting damaged during the download.
I'd first try downloading an installer from the Apple website using a different web browser:
http://www.apple.com/itunes/download/
If you use Firefox instead of IE for the download (or vice versa), do you get a working installer?

I cannot update iTunes because when I run the Apple Software Updater, it says "'iTunes QuickTime' has an invalid signature. It will not be installed." If I try downloading only it says "'iTunes cannot update. Invalid signature.

I cannot update iTunes because when I run the Apple Software Updater, it says "'iTunes + QuickTime' has an invalid signature. It will not be installed." If I try downloading only it says "'iTunes cannot update. Invalid signature. Can someone help?

This forum is for questions from those managing sites on iTunes U, Apple's service for colleges and universities to post educational material in the iTunes Store. You'll be most likely to get help with this issue if you ask in the general iTunes for Windows forums.
Regards.

HT1349 I am trying to download the new version of itunes and it is stating that it has an invalid signature and the downloan has been removed. How can I download it or get the signature?

I am trying to download the new version of itunes and it is stating that it has an invalid signature and the downloan has been removed. How can I download it or get the signature?

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

HT1926 I can download iTunes update but it is removed as error of invalid signature appears.

Trying to update iTunes, it downloads fine but is the download file is removed when the error message "invalid signature" appears. What should I do?

That suggests that the installer is getting damaged during the download.
I'd first try downloading an installer from the Apple website using a different web browser:
http://www.apple.com/itunes/download/
If you use Firefox instead of IE for the download (or vice versa), do you get a working installer?

Trying to download Itunes 11 but am getting a invalid signature which prevents the download

HI I am having troble downloading the itunes 11 version. It stops right before it finishes and says invalid signature, then it cancels the download. What can I do? I tired going to tools and putting in download only but that had the same result.
Thanks

Your profile claims Windows XP, is that correct?
Minimum system requirements for iTunes 11 is Windows XP Service Pack 2 or later.
Does your computer meet these system requirements? Are you downloading iTunes directly from Apple?
Read here > http://support.apple.com/kb/DL1614

Errror downloading iTunes: Invalid signature

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