From the above information, if I understand correctly the application has stopped launching? Or whenever you try to open, it doesn't launch with running as administrator?
As you are running Adobe Reader XI, have you installed in latest patch or updated the application recently? You can launch Adobe Reader XI>Help>Check for update. Or Release Notes | Adobe Acrobat, Reader
have you tried updating it to the latest version Adobe Reader DC? Try installing this and see if that works smoothly for you- Adobe Acrobat Reader DC Install for all versions
Your observation is only partially correct. It is true, I cannot launch the reader; period end of discussion. However, the only way that I can open it is to do so as the administrator.
The suggestion to download a patch or looking for updates via the help tab only yield a notice that Acrobat Reader 11 is no longer supported.
I have absolutely no interest in Adobe Acrobat Reader DC.
Thanks and best regards,
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The support for Adobe Reader 11 has ended. Kindly upgrade to Adobe Acrobat Reader DC Install for all versions.
To know more about Adobe Acrobat Reader DC, please visit Answers to some of the most frequently asked questions about Adobe Acrobat Reader DC.