Software to screenshot a menu under Windows. Normally pressing
PrintScreen causes the menus to disappear.
I don't have any other special "hard requirements".
Software Recommendations Stack Exchange is a question and answer site for people seeking specific software recommendations. It only takes a minute to sign up.Sign up to join this community
If it is a normal menu, (rather than a context menu), then pressing & holding alt while pressing the menu keyboard short-cut, (usually the initial letter but underlined while you have alt pressed), then without releasing alt press the print screen button. You will then get a screenshot of the window complete with menus on your clipboard - if you would like just the menu then you will need to edit with any picture editor, e.g. Gimp.
Greenshot can do that. It doesn't dismiss menus.
Greenshot also has a fairly decent image editor and one click upload to Dropbox and Imgur etc