Perfect free PC optimizer, good looking and you can actually choose the function where it increases the startup speed of your device.
Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Avira - Cloud based email security solution
Norton PC Performance Optimization - Norton PC Performance Optimization that is also called as Norton PC Optimizer is the PC speed enhancement tool by the Norton security system.
Microsoft Security Essentials - Microsoft Security Essentials is Microsoft's own foray into the world of virus protection.
Ashampoo WinOptimizer - Ashampoo WinOptimizer Free – Speed up your system.