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"Instalation failed" every time i try to install.

New Here ,
Sep 23, 2018 Sep 23, 2018

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When i try to install Flash Player, every time at 50% it says: Instalation Failed. I tried to do EVERYTHING, still won't install...
PS. I am installing Polish version, on Windows 7, Firefox.

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Adobe Employee , Sep 26, 2018 Sep 26, 2018
I'm seeing a signature validation failed error, but that should not be the case, as all installers are properly signed, and if they weren't signed, more people would be reporting the issue.As this is a failure with the online installer, I'll forward the log files to the online installer team.In the interim, please try the offline installer posted at the bottom of the Installation problems | Flash Player | Windows 7 and earlier page, in the 'Still having problems' section.

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Adobe Employee ,
Sep 24, 2018 Sep 24, 2018

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Hi,

Please share Adobe_ADM.log and Adobe_GDE.log file from your machine. To get the location of log files, please refer to Where do I find the Flash Player installation log on Windows? page. Once you have the log files, please share them. To share files, follow steps mentioned on How to share a file using Adobe Document Cloud page. Once uploaded the files, post a link here.

Thanks!

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New Here ,
Sep 25, 2018 Sep 25, 2018

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Adobe Employee ,
Sep 26, 2018 Sep 26, 2018

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I'm seeing a signature validation failed error, but that should not be the case, as all installers are properly signed, and if they weren't signed, more people would be reporting the issue.

As this is a failure with the online installer, I'll forward the log files to the online installer team.

In the interim, please try the offline installer posted at the bottom of the Installation problems | Flash Player | Windows 7 and earlier page, in the 'Still having problems' section.

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New Here ,
Sep 27, 2018 Sep 27, 2018

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Thanks, that worked!

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Adobe Employee ,
Sep 26, 2018 Sep 26, 2018

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Is the date and time on your computer correct?  That could cause signature validation to fail.

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New Here ,
Sep 27, 2018 Sep 27, 2018

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The time is 100% correct.

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Adobe Employee ,
Oct 02, 2018 Oct 02, 2018

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The 'signature validation failed' error is due to a sha2 digital ceritificate requirements by Microsoft.  Flash Player installers use the sha2 digital certificate, however, it seems your system is missing the required updates to correctly validate.  Please ensure the following 2 updates are installed:

KB3033929

If you are up to date on your Windows 7 SP1 updates, this should already be installed.
Information: https://support.microsoft.com/en-us/kb/3033929

KB2921916

This system install is not part of standard updates. It is a hotfix, and would need to be installed manually.
Information: https://support.microsoft.com/en-us/kb/2921916

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