I'm going to show you a 10 second technique to screenshot your desktop!
Step 1. Download and install WinShot onto your computer.
Step 2. Launch application from Start->All Programs -> WinShot . A window like the below will apear on the screen.
Step 3. Press "Window key" + "PrtSc" and select a Window
Step 4. A window with the screenshot and options will apear.
Step 5. Click on the floppy disk icon , and the screenshot will be save in "My Pictures" directory.
Step 6. To access "My Pictures" directory click on Start ->My Documents .