Open the Run Dialog box using Win+R hotkey. Type regedit and hit Enter. This will launch the Registry Editor.
Now navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer from the left sidebar.
On the main interface, double-click RPEnabled, change the DWORD Value data to 0, and click OK.
Now restart Windows Explorer, or log off the system and login again to view the change. The Windows 8 start orb, start menu, windows explorer, and task manager will be replaced with that of Windows 7. User won’t be able to tell if you are using Windows 7 or Windows 8.
To revert back the changes, double-click RPEnabled in Registry Editor and change the value back to 1. It’s that simple. Enjoy!