Lots of feature can be unlocked in Windows 8 using registry hacks, but many of the basic users wont feel good to tweak with Registry.
Windows 8 Tweaker is a free and light utility which can enable some of the features found in the leaked Windows 8build 7850.
By using this app you can unable features like :-
- Windows 8 PDF Reader
- Windows 8 Ribbon UI
- Windows 8 Webcam App
- Windows 8 Modern Task Manager
You may use following link to download it :-