Liksoft Free Screen Capture is a free program to make a screenshot. It will suit perferctly either for simple or complex operation as required. This software can help you have a picture of your desktop, any active window or only a certain area of your screen.
For this, it offers you the tools you need to select the desired area such as square, rectangle, ellipse, etc.. Once completed, the result can then be saved as JPG, PNG or Bitmap as desired. If you want, you can also print to any subsequent editing.