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This Error indicates that the Windows Installer Service is currently being utilized for another installation or update at this time. Alongside other program's Installations, Windows Updates can also occupy the Windows Installer service and will thus need to complete prior to running another installation.
However, if a previous installation was unsuccessful and did not close properly, you can end the Windows Installer Process manually:
- Open Task Manager and navigate to the "Processes" tab
- Select "Show processes from all users" if it is not already.
- Locate and end any "MSIExec.exe" with adobe entries you see.
After these steps, attempt the installation again.
You can also refer to links provided here:
I am not on Windows…. I am running Mac OS 10.10.5
On Mac you can look on your activity monitor and close the hanging process.
After that, restart your computer and install the Creative Cloud Desktop App.
This problem has Not been resolved, Installer still fails to update my ACC software. Same error code:81. I do not see any other installers running on my Mac in activity monitor.
I'm on a Mac with the same problem, what is the name of the Adobe installer that I should close in Activity Monitor? Thanks.