Screen Capture
Download.com has a small review of a program called screen capture. I personally use the screen capture utility that comes with onenote. But if you want to capture your screens quickly, give this one a go.
This small utility allows you to save your printed screens without any help of image processing software. Screen Capture deals with Windows clipboard and specially images clipboard. When pressing on Print Screen on the keyboard, Windows takes a snapshot of your screen-content. Screen Capture will automatically save this snapshot to a folder called Captured Screens, inside the program installation folder. You can also choose which format Screen Capture should use to save the images.
Download from here