Error 81 occurs when another Adobe installation process is already running in the background, causing a conflict that prevents new installations.
Before closing any apps, save your work to prevent data loss.
Try any one of the following solutions based on your operating system.
This error is triggered when a previous installation hasn't been fully closed, or a related process is still active in the background. To resolve the issue, follow these steps to close the background processes for your operating system:
Press Ctrl + Shift + Esc to open the Task Manager.
Select the Details tab.
In the search box, look for any of the following processes you want to close.
Right-click the process and select End task to terminate it.
Once all related processes are closed, select Retry to download the Creative Cloud app again.
Press Command + Spacebar to open Spotlight Search and type Activity Monitor.
In the Activity Monitor, select View > All Processes from the menu bar.
In the search box, look for any of the following processes you want to close.
Double-click the conflicting process from the list.
Select Quit. If prompted, select Force Quit.
Force quit any additional processes that may be interfering with the installation.
Select Retry to download the Creative Cloud app again.
