System Optimizer & Tweaker offers many tweaks that modify software, hardware and other settings that affect how the operating system works. They are registry-level settings that can be modified without the pain of searching through a Windows registry. Some Tweaks may determine what is shown on the desktop. Other tweaks may determine what programs are available in the Start Menu. Whatever the Tweak, having control over them means you have more control over your operating system and how your computer works.