Fixing Outlook Error "This process is being used by another process”

[Tom]

1. Press Ctrl+Alt+Delete
2. On the screen that appears, click the "Start Task Manager" button
3. In the Task Manager, click the Processes tab
4. Find the process called Sidekick Tray WPF, click on it, and then click the "End Process" button. If a warning window opens to ask you if you really want to end the process, click "End Process" in that window, too.
5. In your Start Menu, find "Sidekick for Windows" and open it.

[Tom · Accepted solution]

Commenting to mark as answered.