CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Spybot - Search & Destroy - Spybot Search & Destroy is an anti-malware, adware and antivirus program for safe removal of the threats from the PC and browser.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
AdwCleaner - AdwCleaner is a free removal tool for : Adware (ads softwares)