Is it possible to re-install your old antivirus? [on hold]

Is it possible to re-install your old antivirus? [on hold]

Is it possible to re-install your old antivirus? I tried researching it
and it keeps on giving me articles about 'how to install antivirus'. Which
is not what I try to search. And I also asked people about it, and they
said 'yes' so I just want to confirm more about this here.