On the top right hand side of your keyboard, there is a key that says either "Prt Scn" or "Print Screen", with a line under it and then also says "SysRq".
1. Press the Print Screen button on your keyboard - it will capture a copy of what is currently being shown on your computer screen.
2. Open an image editing program, such as Microsoft Paint.
3. On a blank page, go to the Edit menu and choose Paste.
4. If prompted to enlarge the image, choose Yes.
Optional: Use your image editor's crop tool to crop out unnecessary portions of the screen shot.
5. Go to the File Menu and choose Save As
6. Navigate to the folder where you want to save the image.
7. Type a file name for the image.
8. Select a file type (usually either .gif or .jpeg).
9. Click the Save button.