Take a Screenshot

If you want to take a screenshot of what's on your screen 

this is the way to do it providing you have a "PrtSc" key.

Press the print screen key on your keyboard.
It may be labelled "prtSc" or similar.

Open an image editing program, such as Paint.
Go to the edit menu and choose "paste".
Now you can save the image or crop it.

Use your crop tool to crop out unneeded parts of the picture.
Go to the file menu and choose "save as"
Navigate to the folder where you want to save the image and 
type a file name for the image.
Select a file type and click the save button.

If your laptop does not have the PrtSc key.
You can use the Fn key
This key is located lower left of your keyboard.

Press and hold the Fn key and press the "Ins" key
which is usually just above the backspace key.
This saves the screenshot to your clipboard.
Next go to your editing program (paint) and follow the steps 
outlined above from "paste".