I guess laziness has its effects. All I had to do was to go to MSDN, download Windows 8 Pro. As my internet was a bit slow, I took the ISO from a colleague, did not check whether its Windows 8 pro, now I realised that I am in Windows 8.Some one can please tell me ways to upgrade from windows 8 to windows 8 pro, I dont want to format my machine again.BTW what are the benefits of Windows 8 Pro?