Avira
Malwarebytes
360 Total Security
Microsoft Security Essentials
AVG AntiVirus
Windows Defender
ESET NOD32 Antivirus
Panda Free Antivirus
Registry Reviver
Ad-Aware Free Antivirus+
CCleaner
Easy PC Optimizer
Advanced System Optimizer
Norton PC Performance Optimization
Ashampoo WinOptimizer
Asmw PC-Optimizer pro
Registry ReviverMalwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
Ad-Aware Free Antivirus+ - Ad-Aware Free Antivirus+ is a world’s most leading security solution that gives you comprehensive malware protection with real-time monitoring, threats alerts and automatic updates you can rest easy knowing that you are protected.
360 Total Security - 360 Total Security was created by Qihoo 360 Technology Co. Ltd. This Chinese-based company provides a number of software solutions for PC, mobile devices and online security. Read more about 360 Total Security.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Microsoft Security Essentials - Microsoft Security Essentials is Microsoft's own foray into the world of virus protection.
Easy PC Optimizer - Easy PC Optimizer is an easy and quite simple tool for enhancing the performance and boosting up the speed of the system.