Error P81 or 81 occurs when you install Adobe Acrobat

When you try to install Acrobat from the Creative Cloud desktop app, you receive the error message with error code 81 depicted in the screenshot.

Solution

To resolve the problem, try one of the following solutions:

Solution 1: Close the Adobe processes and restart your computer

Close all Adobe processes, and restart your computer. Then, try reinstalling Acrobat from the Creative Cloud desktop app. For more information, see Close conflicting processes or applications.

Solution 2: Rename the PDApp folder

The Adobe Application Manager or the PDApp.exe is installed in the PDApp folder. When you try to install or update any Adobe application from the Creative Cloud desktop app, it calls the process to run in the background. Renaming the folder will force close the process running in the background.