免費的Windows系統優化掃描工具

Glary Utilities: http://www.glarysoft.com/products/utilities/glary-utilities/

IObit Toolbx: http://blog.iobit.com/iobit-toolbox-will-release-soon_3571.html

IObit Advanced SystemCare Free: http://www.iobit.com/advancedsystemcareper.html