Real quick: `⌘+SHIFT+S` That key combo (Command Key + SHIFT + S) will open Snip & Sketch, which is the replacement for the classic Snipping Tool and includes the keyboard shortcut above to make it easy to access. Once you press the key combo, the app opens with a selector dialog to let you outline the portion of the screen you want to copy to the clipboard. You can select the entire screen if you need that. And once done, you can press CTRL-V to paste the copied image wherever you need it (Paint, Gimp, etc). Lots of disparate advice exists on Q&A and other forums with solutions that vary heavily. But Snip & Sketch will work with any Windows 10 installation and the shortcut key makes it the optimal solution.