Nowadays few people fall into this (even the most lay). Beware of Chinese anti-virus (such as Baidu, 360 Total Security and Tencent), as they profit from advertising, and are not security-focused. In addition to collecting personal information that is useless to an antivirus.
NONE antivirus detects 100% of existing malware, and Malwarebytes is an anti-malware, not an antivirus. However, if you use the paid version of it (which has real-time detection) is a great choice, since Malwarebytes has a wide detection and is excellent against exploits.