I habe upgraded my sony laptop sve1511aen model from windows 7 to windows 8. Suddenly after the windows 8 got installed, i realised i have lost all the softwares provided by sony. Even the function button works, nor the media player works which was provided by sony. I need to know, what is to be done now? Should i reinstall windows 7 and then later take a backup and then again install windows 8?