We are deals with security, speed and performance of websites and PC,
What viruses,malware or any other hidden codes slow down your site loading speed and performance make it unsecure .Several case studies have demonstrated that fast loading sites can significantly increase the performance of your site.Because Google counts site speed as a ranking factor so that's why fast loading sites RANK more faster then slow loading sites.Also You’ve probably heard this before, but when a person lands on your site for the first time, you only have a few seconds to capture their attention to convince them to hang around.
Virus: A program or programming code that replicates by being copied or initiating its copying to another program, computer boot sector or document.
Adware: Any software application in which advertising banners are displayed while the program is running. (popups, banners, redirects) etc.