If you want to take a screnshot in Windows, you have a couple of options at your disposal. First, you can use the built-in function, using Shift+Print Scrn to take a screenshot of the screen. If you want to take a screenshot of just the current window, use Alt+Print Scrn. Next, paste the image in another program, like Paint.
If you’re using Windows Vista or Windows 7, you have a tool at your disposal, the Snipping Tool.
There are also a number of other options at your disposal.
Using a browser extension – I recommend the FireShot add-on, which has versions both for Firefox and Internet Explorer.
Using screenshot software