@acarson Launch JAWS Manager with JAWS Key+F2, arrow down to keyboard manager, and hit enter. When it loads, if it does not say default.jkm keyboard manager, then press CTRL+SHIFT+d. Then tab to the second list view, and hit m and then down arrow until you hear manage calls alt+win+c default. you can then either hit CTRL+H to change the shortcut, or delete to remove it. Then alt+f4 to save and close. Restart JAWS. This should do the trick.
Adam MacLeod (fedi.adamm.cc)
@acarson Launch JAWS Manager with JAWS Key+F2, arrow down to keyboard manager, and hit enter. When it loads, if it does not say default.jkm keyboard manager, then press CTRL+SHIFT+d. Then tab to the second list view, and hit m and then down arrow until you hear manage calls alt+win+c default. you can then either hit CTRL+H to change the shortcut, or delete to remove it. Then alt+f4 to save and close. Restart JAWS. This should do the trick.