Windows 8 is finally available and many users will install it on their computer. In this tutorial I will show you how to upgrade from Windows 7 to Windows 8 and keep all your files intact. However there are few things you need to pay attention on before you start the installation because both Windows versions must be the same in order to upgrade. For example you can upgrade from Windows 7 Ultimate 32-bits to Windows 8 Pro 32-bits, but you can’t upgrade from Windows 7 Start to Windows 8 Pro or from Windows 7 32-bit to Windows 8 64-bit, so keep these things in mind before you start the upgrade process.