Skype recently release their newer skype version for windows. It's called Skype 4.0 With this new version you'll get all the fetures which you used to have on your old skype program plus Bigger video, Crystal clear and even more reliable Calls and Pick up and switch between conversations.
New skype interface is redesigned for the newer version and it's beautiful. To setup this on your computer you'll need following system requirements.
Download Skype 4.0 For Windows from here