Razer Cortex

Razer Cortex is a free system optimization tool from gaming hardware manufacturer Razer

Its focus is on getting better performance in your games, though it includes a few system utilities for cleaning up your machine and defragging your hard drives

When you engage Game Booster, it stops non-essential background services and processes that eat up precious memory and CPU time

When you’re finishing playing, you switch off Game Booster, and processes are started up again

It can be used to defrag the files used by your games, potentially reducing frame drops caused by excessive disk accesses