Can antivirus software remove every virus on its own?

Built-in and consumer antivirus tools like Malwarebytes or Windows Defender can catch basic threats, but they often miss rootkits, trojans, and persistent malware that embeds itself in system files. For a verified clean system, professional removal is recommended. If you are dealing with pop-ups, browser redirects, or ransomware, consumer tools are unlikely to fully resolve the issue.