CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
ShutUp10 - Free antispy tool for Windows 10
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
W10Privacy - Very advanced tool to control Windows 10 privacy.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
WindowsSpyBlocker - Block spying and tracking on Windows