BleachBit - System Cleaner

BleachBit strips away the elegant interfaces and pretty colors of similar system-cleaning software, focusing instead on doing the job it’s meant to do: highlight the cludgy files, dud registry keys, and unhealthy amounts of cookies on your PC, and clean them up for you. It also deletes/refreshes system files like the memory dump, various logs and Prefetch caches to give your PC an under-the-hood fresh start (while not deleting your personal data and files, of course).