Screen Capture is critical nowadays as we need to share our 'screen' information with others - either to explain to them what it is - or to ask a question on where we need help!
The easiest way to achieve this is - Snipping Tool. It is from Microsoft - so it is built-in with the Windows platform - be it the older version of Windows or new Windows 10.
Easy to use - and easy to save screenshots by this Snipping Tool.
Have you tried it?
For Windows 10 - type Snipping Tool in the search box on the taskbar, and then select Snipping Tool.