The best antivirus and its bundle for a highly vulnerable system?

Question

Computer networks

Please, tell me the best antivirus and its complete set.
We need serious protection and that it is enough, even very flexible.
For example: if Avast, which one - Premier or Enpoint Security?
Although Premier will probably be rather weak)
Because the attacks on the PC are professional and in large numbers, moreover, targeted.
A sort of super-antivirus (even with a large manual setting).
Thanks in advance!)

Answer 1

tell me the best antivirus and its complete set. ... A sort of super-antivirus

linux.