On Tue, Sep 24, 2019 at 6:59 PM Albert <georgealbert@qq.com> wrote:

> I'm sorry, the default value of w32-pass-lwindow-to-system is t. I dont'
change w32-pass-lwindow-to-system in init file.

So, let's recapitulate.

- You start Emacs 27.0.50
- In your init file(s), you do not change the default value of
w32-pass-lwindow-to-system
- While Emacs has the focus, if you press an lwindow combination, Emacs
catches it and it is not passed back to Windows.
- So, from inside 27.0.50, you cannot do LWin+R o LWin+D, etc.
- But this didn't happen with Emacs 26.2.

Am I right now?

If so, when you're inside Emacs 27.0.50, what does it say when you examine
the value of w32-pass-lwindow-to-system? For example, with
describe-variable.

Does still happen if you start Emacs with

   emacs -Q

?