Originally created for Linux, BleachBit is one of the best programs to speed up a Windows computer for several reasons. For starters, it does not cost money, something important. It also has a simple interface and nothing recharged, in which practically only you have to press a button to proceed with the cleaning.
It is light, that is, it hardly consumes resources or space on your hard drive. Its retro look should not deceive you: it does its job perfectly, but without colorful additions such as CCleaner and other applications to optimize Windows.