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If you need better protection for your PC for free, then you can definitely use some great free Antivirus software such as AVG Antivirus Free, Avast Free Antivirus, etc. To protect the computer from various spyware and viruses, the security software uses a constantly updated database and has a security module of the integrated Windows browser and its own scheduler to schedule a full scan. This free security software can integrate easily with the operating system of the PC to provide better protection from different types of viruses, spyware, trojans, etc. It is developed by Microsoft for Windows PC. Microsoft Security Essentials for Windows is very reliable anti-virus software.
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