Do not download nor purchase BestsellerAntivirus! It is fraudulent software presented as a security tool; however, Bestseller Antivirus is a scam. It is also a computer parasite related to another scam called System Defender. BestsellerAntivirus loads pop-ups and fabricated security alerts to scare people and make them buy license of Bestseller Antivirus.
Don't get trapped by this malware! Remove BestsellerAntivirus without hesitation.