When trying to install Greenshot on fresh copy of Windows 10, the following error occurs
Please, note that the question is about Windows-10. Questions about Windows-7 and below are not "duplicate".
UPDATE
How to install Greenshot so that PrintScreen work?
Best Answer
On a new PC, press printscreen and the first time OneDrive pops up and offers you to save screenshots. Select No and the key will be free for Greenshot.