Command+Shift+3: Take a screenshot of the full screen, and save it as a file on the desktop
Command+Shift+4: Select an area. The screenshot will save as a file on the desktop
The best way to take a screenshot is to use the Snipping Tool. This can be found in your accessories. To find this:
1. Click on the "Start" Button to open the Start Menu.
2. Click "All Programs"
3. Open the "Accessories" folder
4. Select the Snipping Tool as indicated below.
Once you've launched the snipping tool, simply Click and drag your mouse to fully encompass your screen. Click again and it will take the screenshot. Save this file to your desktop so you find it easily.