Win screensaver doesn't exit properly

[davidpanderson]

In 7.8 on Win7, if the BOINC screensaver kicks in while BOINC is not running, it correctly shows that.
But when you move the mouse, a BOINC icon remains in the system tray.
Left-clicking brings up a black screen.
Right-clicking shows only "Close window", but that has no effect.

[Ageless93]

Reading https://answers.microsoft.com/en-us/windows/forum/windows_10-hello/wake-up-from-screen-saver-is-only-by-ctrl-alt-del/6e772e86-8403-4034-8b19-aea31db60400, it may be possible that this is a problem in Windows 10 itself, by chance due to it being installed on older (all-of-a-sudden-not-supported) hardware.