If you are looking for a Windows 7 Tweaker, or a Tweak UI for Windows 7 and Vista, there’s none better than Ultimate Windows Tweaker. It is a freeware TweakUI Utility that lets you optimize your Windows Vista & Windows 7 user experience, both 32-bit and 64-bit.
You can simply download the application and make changes to your Windows right after installing it. The software lets you make your Windows OS more stable, secure and faster. The best part about it is that it automatically detects whether you are using Windows 7 or Windows Vista and offers you the recommended tweaks automatically.
Here are some of the customizations UWT allows you to do:
Disable Windows Security Center service
Disable System Restore settings
Disable Change Color and Appearance
Disable Windows Startup sound
Enable Large System cache
Delete pagefile during shutdown process
Disable Aero Snap
Sorted Startmenu with all Windows 7 items
Live Search in Custom Start Search
Use large icons on Taskbar
Loads of other optimizations as well