It is actually most ideal to have just 1 antivirus program in
any 1 PC terminal, however, it’s got to be updated regularly with
the latest definitions, if not, it’s of not much use. But that
said, it is alright to have more than 1 antivirus program in a PC
terminal, provided only 1 is made active at any 1 time. To prevent
conflicts or misidentifying each other’s behaviour as that of a
virus. Run 1 program at a time, and ensure that both programs are
not active together, especially in default options such as email
scanning or real-time protection etc.