Defiinelty something is stealing that Control+Shift+D combo even if I don't see anything happening because I just tried the same combination on Premiere Pro where it's supposed to apply the default audio transition and it also does not work.
I googled other programs that use that combination and for example the windows calculator should erase the history when using that combo but it doesn't do anything. Supposedly Notepad should delete a line with that combo but also does nothing. Microsoft workd should double underline the text, also does nothing.
I even found this keyboard tester ( https://defkey.com/keyboard-tester )and it shows all the combinations of keyboards I do and a list of the programs that use it. And I can get it to show other keyboard combos but if I press control+shift+d it only recognizes like I typed control+shift . It's not that the D key is damaged since I can type it everywhere. I have no idea what can be causing that the combination control+shift+d is not recognized anywhere.
I FINALLY solved it!!!!! I downloadd a tool called Hotkey Detective ( https://github.com/ITachiLab/hotkey-detective/releases ) and with that I found out that the screen recording app iTop Screen Recording uses that shortcut to activate the Magnifier option. I'm not sure what it does since nothing happens but I just deleted that shorcut from there and now the Control+Shift+D combo works everywhere!!