I have been using SB on my personal laptop for a week now; because my pc has broken. My laptop has been infected with some viruses i think. I ran Kaspersky Internet Security Full scan and it shows everything okay. But, I see my laptop freezing sometimes and my CPU usage shooting to 100% every now and then. It might malware instead but I am not sure. What softwares do you suggest for me to use to keep my laptop free from viruses and trojans and malwares??