Press the PrtScn key to capture the entire screen
Press Alt + PrtScn to capture the active window
Open Paint or another image editor
Paste the screenshot with Ctrl + V
Save the file using File > Save As
Press Windows key + PrtScn if supported to save a screenshot automatically
Use Snipping Tool from the Start menu to capture a selected area
Choose New in Snipping Tool
Drag to select the area you want
Save the screenshot from Snipping Tool