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

ComboFix - Combofix is a free anti-malware program developed by sUBs for Windows computers

BleachBit - When your computer is getting full, BleachBit quickly frees disk space.

Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .