Hi,
Have tried everything under the sun but Adobe Flash will not install on IE9 OR Firefox 3.6.24.
The error is ‘CERTIFICATE AUTHENTICATION FAILED’. I have tried uninstalling then reinstalling and still get the same error. ActiveX Filtering is unchecked so this is not the problem. I installed the certificate successfully but still the same error. Can anyone lend a hand here?
Cheers! 
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Have you tried installing from our stand alone installers? You can find them here:
Where can I find direct downloads of Flash Player 11 for Windows or Macintosh?
Chris
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Hi Chris,
Yes I tried both but the same error still occurred. Any other suggestions? 
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Are you saving the installer file to your hard drive and then running the installer from your hard drive?
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I suspect we’re having a problem with the code signing mechanism in Windows, though I’m surprised that saving and running the stand alone installer didn’t help. Could you run the “Fix It” utility that Microsoft provides in the Resolution section of this KB article to see if that helps?
http://support.microsoft.com/kb/822798
Thanks,
Chris
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I can’t get that far Carl as the attached error is received when I try the ‘save’ option.
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Hi Chris,
Have run the Fix It utility and everything checks out ok. 
Any other suggestions from here?
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Download the files, don’t try an online uninstall or install.
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Wont work Carl 
I tried this prior to contacting you guys and have tried again with the same result..
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Have you tried here since this is system problem.
http://answers.microsoft.com/en-us/windows/forum?tab=all
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i have the same problem. When trying to install the new flash it gives me the cirtifiicate of authentication error and will not let me install flash on Windows 7 64 bit. any help?? I tried the fix it utility also,
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Could you guys check the following out for me?
1. Go to the start menu and type the following: gpedit.msc
2. In the Local Group Policy Editor dialog that appears, navigate to the following dialog:
User Configuration > Windows Settings > Internet Explorer Maintenance > Security > Authenticode Settings
You should see a dialog similar to this
Please verify that the “Enable trusted publisher lockdown” checkbox is unchecked. If checked, uncheck it and click OK.
Thanks,
Chris
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mine wasnt checked…
Date: Tue, 31 Jan 2012 17:18:46 -0700
From: forums@adobe.com
Subject: Re: Problems with certificate Authentication in IE9 Problems with certificate Authentication in IE9
Re: Problems with certificate Authentication in IE9
created by Chris Campbell in Installing Flash Player – View the full discussion
Could you guys check the following out for me? 1. Go to the start menu and type the following: gpedit.msc2. In the Local Group Policy Editor dialog that appears, navigate to the following dialog: User Configuration > Windows Settings > Internet Explorer Maintenance > Security > Authenticode Settings You should see a dialog similar to this
http://forums.adobe.com/servlet/JiveServlet/downloadImage/153890/1-31- 20124-17-19PM.png Please verify that the “Enable trusted publisher lockdown” checkbox is unchecked. If checked, uncheck it and click OK. Thanks,Chris
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Can you try “unblocking” the application using the steps outlined in this post?
Chris
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iam just gona format lol… the easy way.. thanks anyway
Date: Tue, 31 Jan 2012 17:46:09 -0700
From: forums@adobe.com
Subject: Re: Problems with certificate Authentication in IE9 Problems with certificate Authentication in IE9
Re: Problems with certificate Authentication in IE9
created by Chris Campbell in Installing Flash Player – View the full discussion
Can you try “unblocking” the application using the steps outlined in this post? http://forums.adobe.com/message/4090545#4090545 Chris
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