I not-infrequently find myself wanting to run an app as an administrator, when I already have an instance of it open, which I don't want to close (for instance, notepad or cygwin).
With no instances open, I can right-click on the icon in the task bar and choose 'Run as Administrator'. However, when an instance is already open, right-clicking only gives me options dealing with that window (resize, close, etc), not for opening a new instance as an administrator.
How can I open a new instance of an application as an administrator?