ITunes signature is invalid??!!

I am trying to download that latest version of iTunes, but it keeps saying that it can't download because my iTunes signature is invalid. What does this mean and how can I fix it?

That one suggests the installer has gotten 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?

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"iTunes" signature is invalid software will not be installed

When I start iTunes on my WIndows XP Pro system and check for updates, I get all the way through the download then get a message saying that the software signature is invalid and will not be installed.
What is the problem? How do I fix it so that I can upload current iTunes software on my windows-based PC?

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]]

HT1926 Why ,when Itry to install the latest update for iTunes does it say that my iTunes signature is "invalid" when I have used this same computer for years and have installed all the previous updates? Thank you.

Why, when I try to install the latest iTunes update, itsays that I have an "invalid" signature...I have used this same machine and have installed all the previous updates with no problem.

That one suggests the installer has gotten 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 am trying to download latest version of Safari and Itunes, and I get an error message that my signature is invalid.

I am trying to download latest version of Itunes and Safari, and I get an error message that my signature is invalid. Help?

I am trying to download latest version of Itunes and Safari, and I get an error message that my signature is invalid. Help?

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.

I am trying to upgrade to iTunes 11.4 and get an error message that says " iTunes has an invalid signature. It will not be installed" How do I fix that?

I am trying to upgrade to iTunes 11.4 on my Windows7 PC and get an error message that says " iTunes has an invalid signature. It will not be installed" How do I fix that?

Hi curliejo,
Welcome to the Apple Support Communities!
In your situation I would recommend the steps in the following article for troubleshooting iTunes. It may be necessary to completely remove and reinstall iTunes in this situation. Be sure to remove all of the components with iTunes in the correct order as outlined in the article before installing fresh.
Issues installing iTunes or QuickTime for Windows
Have a great day,
Joe

When I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and wont be installed. I use Windows 7.

Everytime I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and can't be installed? I have tried to install it two times and get the same message each time. Any solutions to my problem?? Those who have installed ITUNES 11 is it hard to work with? maybe im lucky it wont update?? I don't know.

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 am trying to update i Tunes to new version i get a message saying iTunes has an invalid signature and will not install.Any help please.

I am trying to update iTunes to new version .
When it goes to install i get a message saying iTunes has an invalid signature and will not install.
Any help please.

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.

HT1926 itunes update says invalid signature??

I am trying to update my itunes on my HP pc. I got an error message, which said to try Tools, then Download Only. I tried that, it started to download, then quit when I got a message that said "itunes has an invalid signature, the download has been removed." This has never happened before, and I have updated itunes many times! Can anyone tell me what is going on??

You can try manually updating by uninstalling the current version you have and going to http://apple.com/itunes/download

I cant download the itunes 11.1 it says itunes has an invalid signature what can i do ?

i cant download the itunes 11.1 it says itunes has an invalid signature what can i do ?

Have you tried several times?
Look at some of the topics in the right panel ------->

Trying to update to iTunes 10.5, keep getting message "iTunes has an invalid signature. It will not be installed". Others are also posting this problem but can't seem to find any answers

Trying to update to itunes 10.5, keep getting message "iTunes has an invalid signature. It will not be installed". Others are also posting a similar problem but can't find any answers.

Please can anyone help on this

TS3212 when i try to download the latest version of itunes i get invalid signature, what daoes this mean.

When i try to update my itunes i get invalid signature, what is this and how do i download the latest version?

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?

While downloading the newest version, I receive an error saying itunes has a invalid signature and wil not download. Help!!!!!!

When downloading the newest version, I get an error message saying iTunes has an invalid signature and will not be downloaded. Help!!!!!

Thank you for using the Apple Support Communities
I am assuming you are having difficulties installing the latest version of iTunes. Are you using a Windows PC or a Macintosh? Which version of Windows or OS X are you using?

Unable to update iTunes. Get 'iTunes has an invalid signature. It will not be installed.' When I reboot, get message 'Apple Sync Notifier.exe entry point not found'

Unable to update iTunes. Get 'iTunes has an invalid signature. It will not be installed.' When I reboot, get message 'Apple Sync Notifier.exe entry point not found'
Please help...need to get newest update so I can activate my new IPhone4. Thanks

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?

Error "itunes has an invalid signature". Will not install. Why?

Every time I try to update iTunes on my desktop computer I keep getting the same error message "iTunes has an invalid signature. Will not install. Why am I getting this message? and how can I fix it.
ITunes came with the new HP I purchased in 12/2013. I have had a problem only with updates. I thought about uninstalling on my desktop but do not want to lose my songs. Was hoping to find a better solution than uninstalling and then re-installing.
Any how would be appreciated.

The error suggests some sort of corruption with the file you downloaded. Clear your browser's cache and download a fresh copy of the iTunes setup file.
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. Review the other boxes and the list of support documents further down the page in case one of them applies.
Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.
If you are running 64-bit Windows and the above steps haven't helped try installing the version of iTunes that can be downloaded from this support document. iTunes 12.1 for Windows (64-bit — for older video cards)
tt2

ITunes signature is invalid??!!

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