Avira is the best free one I've found. The best anti-viruses you're bound to have to pay for.
Malwarebytes is good for malware, but it may conflict with other virus programs. I've had Avira and Malwarebytes in the past but now I just use Avira.
Malwarebytes is good for malware, but it may conflict with other virus programs. I've had Avira and Malwarebytes in the past but now I just use Avira.