Close the Creative Cloud desktop application.
Error P81 or 81 occurs when you install Adobe Acrobat
When you try to install Acrobat from Creative Cloud desktop application, you get an error - “Another installer is currently running, which must be closed before installing the product. Please close other installers. (Error code: 81)
To resolve the problem, try one of the following solutions:
Solution 1: Close the Adobe processes and restart your computer
Close all the Adobe processes and restart your computer. Try installing Adobe Acrobat.
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 Creative Cloud desktop application, it invokes this process to run in the background. Renaming the folder will force close the process running in the background.
Navigate to the PDApp folder:
/Users/<user folder>/Library/Application Support/Adobe/OOBE/PDApp
- 64-bit: \Program Files(x86)\Common Files\Adobe\OOBE\PDApp
- 32-bit: \Program Files\Common Files\Adobe\OOBE\PDApp
Rename the PDApp folder to PDApp-old.Märkus.
If the PDAPP folder is not visible in the specified location, change your system settings to allow hidden files and folders to be displayed. To enable the setting, see the below articles:
Launch Creative Cloud desktop application and install Adobe Acrobat.