ShareX

Snipping Tool covers a quick grab. ShareX covers everything after it: region, window and scrolling captures, screen recording, text recognition from a capture, and an after-capture pipeline that can annotate, save, copy and upload in one keystroke. It is free, open source, carries no ads and needs no account. The catch is the settings window, which is enormous and can feel like configuring a server. Set a hotkey, pick where captures are saved, and turn off any upload destination you do not want, which matters on a machine that handles anything confidential. After that it simply works.