Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
Avira - Cloud based email security solution
AdwCleaner - AdwCleaner is a free removal tool for : Adware (ads softwares)
Microsoft Security Essentials - Microsoft Security Essentials is Microsoft's own foray into the world of virus protection.
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.
Windows Defender - Windows 10 security delivers built-in & ongoing protections you can trust: Windows Defender Antivirus, firewall, family settings, ransomware protection, real-time protection & more. Stay up to date & protected at no extra cost.