You could try to see if the Launcher is already running in the background...
To check (and maybe fix) this, first go to your Task Manager, (Ctrl+Alt+Del). Then, go to the tab that says "Processes." Sort the list by name and look for "Launcher1.exe." If you see it there, then select it and push the button on the lower right hand corner that says "End Process."
That is all I can think of at the moment... Hope this helps!
