Win7Zilla is a tweaking and system maintenance utility for Windows 7. It provides a wide range of features that helps you master Windows 7, including: Windows 7 Settings manager (manage Windows 7 settings easily with an immediate effect) System information, OEM and User information, Windows 7 Logon Screen changer, Gaming performance Booster, Internet Connection Optimization, Physical Memory Optimization, Files Cleaner and Registry Cleaner etc.