Free virus protection and optimization
A free and safe companion: Avast Free Antivirus
Free and comprehensive protection suite
Free and simple antivirus software from Microsoft
360 Total Security Essential
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Disk Drill Windows Data Recovery
A professional data recovery tool
Kaspersky Anti-Virus
The ultimate protection against viruses
Avira Free Antivirus
A free anti-virus, anti-malware and anti-ransomware program