Purrint is an excellent alternative for the button of "Print Screen". This is a screen capture tool that weighs only a few kilobytes, which requires no installation. With this tool, you can capture a screen with a single click or by using a hotkey and save the snapshot to your computer as a BMP, PNG, JPG. Moreover, this tool can also print your images or transfer them onto a clipboard. Of course, the software is totally free and works on all versions of Windows.