If you are using Avast, you might have faced the issue when you try to uninstall Avast to reinstall it or to install another antivirus on your computer. The uninstallation doesn’t start at first, and a dialog appears on the screen with a message saying ‘Setup is already running. Please try to start the setup later.’ It also has the ‘View Log’ button in it. But, when you click on the button to open it, ‘Avast Log Viewer’ appears and it doesn’t provide any information to troubleshoot the issue, leaving you stuck nowhere.
How to fix Avast’s ‘Setup is already running’ error and why does this problem arise?
Keep in mind that the instup.exe of Avast is downloading and updating virus definitions in the background, while you are using your computer. For confirmation, you can see this process running in the task manager too. The software will not allow you to stop the process, and if you try, you will get an inability to terminate the process dialog that displays ‘The Operation could not be completed. Access is denied.’
Let us see how to fix this and remove Avast antivirus without any problems in the simplest possible manner.
- First of all, open Avast User Interface, go to Settings, and click on Troubleshooting. Remove the tick mark for the ‘Enable Avast self-defense module’ and click ‘OK’.
- Open the Task Manager, and kill the instup.exe process if it is running.
- After that, a pop up will appear that will tell you to update virus definitions. All you need to do is ignore it, and uninstall Avast.
Now you can uninstall Avast, without getting an error.