Winaero Tweaker - is an all-in-one tweaker, system information, and privacy tool for Windows 7, Windows 8, Windows 8.1 and Windows 10.
Features
• Change Windows Update behavior which is locked to "Install updates automatically" in Windows 10 Technical Preview.
• Enable the secret hidden experimental Date & Time pane which is not enabled by default in Windows 10 Technical Preview.
• Enable the secret hidden experimental Login Screen which is not enabled by default in Windows 10 Technical Preview.
• Easily switch between the old resizable Start menu and the new "Continuum" Start menu in Windows 10 Technical Preview.
• And much more..
Download: 
Winaero Tweaker 1.63.0.0.zip - 5.2 MB
Winaero Tweaker 1.63.0.0 Portable