The snipping tool is great.

The other way i have taken screenshots is to just look on my keyboard (and this key is up in the top row, right hand side on mine) for a key that says print screen.

When there is something on my screen i want to take a photo of, I just push that key in. That saves the image for you.

Then I go into Paint (I think all computers have it, it should show up if you do a search) and in Paint, I push the top button that says paste.

That way, the print screen image that was saved is then pasted in paint and I can edit it in there, crop, add text, arrows, what have you, then save into a folder.

It probably isn't the most tech savvy way to do it but at least it is easy to remember.