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Ultimate Windows Tweaker - Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows.
Ashampoo WinOptimizer - Ashampoo WinOptimizer Free – Speed up your system.
GIGATweaker - GIGATweaker is a powerfull and compact application that allows you to optimize and tweak your OS.
Uniblue SystemTweaker - SystemTweaker is a safe and easy to use tool that lets you customize Windows to your taste.
Wise Care 365 - Wise Care 365 is a bundle of important registry, disk, and other system utilities for your PC.