Error: There is a problem with Adobe Acrobat/Reader

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You may see this error when you try to open Adobe Acrobat or Adobe Reader. (The application may be in Protected Mode when it is launched.)

Error message

There is a problem with Adobe Acrobat/Reader. If it is running, please exit and try again. (523:523)


In Adobe Acrobat, choose Edit > Preferences > Security (enhanced) and clear the Enable Protected Mode at startup checkbox.

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Internal only

Refer to TFS 1069451 for more information.

Below are the registry keys to change.

For Reader DC:
HKCU\Software\Adobe\Acrobat Reader\DC\Privileged
DWORD Value: bProtectedMode
Setting: 0x0

For Reader 11:
HKCU\Software\Adobe\Acrobat Reader\11.0\Privileged
DWORD Value: bProtectedMode
Setting: 0x0

There are “enterprise” keys that show up at HKLM that might work as well, but this has not been tested. For Reader DC, it is supposed to be:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown