Hey Christoo. While you cannot install Windows 7 as a core OS (Operating System) on the tablet as the hardware differs greatly (among other factors), you can install a Windows 7 launcher and theme. Use the one called 'Android Windows 7 Launcher' from Play Store for an almost complete Windows 7 transformation. Please note the this will not then give you the ability to install Windows-based applications unfortunately. You will still have to depend on Google Play store apps.