Periodically, I will see this:
What causes them, and how do I get rid of them without rebooting? I'm running Windows 10.
Periodically, I will see this:
What causes them, and how do I get rid of them without rebooting? I'm running Windows 10.
I've seen this coming from few different applications already. Yours are mini tooltips showing keyboard shortcuts to commands in ribbon menu. They are windows on their own, not only some graphic leftovers painted on desktop. They most likely belong to some application which uses ribbon interface.
Exit that application (or kill it if exiting is not possible) and they are gone.