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  • I have GNU Emacs 27.2 (build 1, x86_64-w64-mingw32) of 2021-03-26 installed on a new win11 laptop. I did not have this problem with my previous win10 laptop, and I do not have this problem when using the same .emacs file on a linux server . I invoked emacs with the -Q option and evaluated (setq cursor-type 'box) and it returned the value of box, even through the cursor is a non-blinking vertical line. If I do C-h v cursor-type I get the following: cursor-type is a variable defined in ‘C source code’. Its value is ‘box’ Original value was t Local in buffer scratch; global value is t Commented Feb 10 at 17:42
  • checking the blink-cursor-mode returns: blink-cursor-mode is a variable defined in ‘frame.el’. Its value is t However the cursor is unblinking. Sometimes I need to edit code on my laptop which is why I have emacs installed there. Commented Feb 10 at 17:51
  • I have now tried Emacs 29.4 on Windows 11 and I cannot reproduce any of your findings (even without -Q but without a personal init file). (blink-cursor-mode +1) turns on blinking, (blink-cursor-mode -1) turns it off, (setq cursor-type 'bar) turns it into a bar cursor, (setq cursor-type t) goes back to the (default) box cursor, (set-cursor-color "blue") turns the cursor blue. The only thing I changed was to make the blinking permanent: by default, after ten blinks, it stop blinking and you get a solid cursor. I customized the entry Blink Cursor Blinks and set it to 0. Commented Feb 10 at 21:59
  • The only thing I can think of is that Emacs 27.2 does not support these things, but I will not downgrade that far to test that. But searching through git logs, the last mention I find of blink-cursor-mode was in the Emacs 26.1 time frame. So I think that it is unlikely that 27.2 is the cause (although you might want to upgrade). I think you are doing something wrong, but I cannot venture a guess as to what. Commented Feb 10 at 22:03
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    @NickD My work laptop is on Windows 11 and has Emacs 27.1 on it and the code you describe works the same there as the Emacs 29 that I have on the Linux cluster. Commented Feb 12 at 0:08