WinExt System Optimizer is a 100% FREE software. It can greatly improve system performance, speed and stability by optimizing the settings of start / shut down, stability, system, UI, network and SSD. Includes dozens of optimizing sub-functions, such as disabling drive defrag on boot to speed up start, closing frozen programs to avoid system crashes, etc. In addition, it supports to do (Un)checking all / recommending for features and result lists, and export result to txt/csv/xls/xlsx file. At last, this system optimizer just is a sub product of WinExt, the second one have many other features, sure, contains system optimizer.