Array Configuration Utility 7.60.18.0 error

Hi,
I have this error when I want to open my HP configuration. It’s saying that this app is already running and I should close it first. I opened my Task Manager in Processes tab and is not running, but I have this error every time. Can you help me to fix this error? What should I do to prevent this?

Array Configuration Utility 7.60.18.0
Only one instance o the Array Configuration Utility can be running.
The Array Configuration Utility is already running as an application on this server.
In order to perform this operation, you must first close the existing running ACU.
