To take a screenshot on a computer running Windows, here are the most common methods:

1. Press the Windows key + Print Screen key simultaneously. This takes a screenshot of the entire screen, saves the image to the Screenshots folder in the Pictures library, and also copies it to the clipboard for pasting elsewhere.
2. Press the Print Screen (PrtScn) key alone to copy a screenshot of the entire screen to the clipboard, which can then be pasted into an app like Paint.
3. Press Alt + Print Screen to capture an active window to the clipboard.
4. Use Windows key + Shift + S to open the Snipping Tool overlay, which lets you select a rectangular, freeform, window, or full-screen snip to copy.
5. Open the Snipping Tool app from the Start menu to take screenshots with delay and annotation options.

Screenshots taken with Print Screen methods can be pasted into documents or image editors using Ctrl + V, and those taken with Windows + Print Screen are saved automatically to a folder for easier access.