Can be related to delete...Harmful substances must be deleted to prevent danger.
most of the VIRUS DELETE files and hence they are HARMFUL i.e DELETERIOUS
If A deletes B then for B, A is harmful (Just imagine)
DELETE the TEARS OF US
delete terrible to us- as in harmful
its sound like "serious"-if any person is serious it is HARMFUL to others..
seriously delete it because this virus is very harmful
anything deleterious is so evil it originally intends to delete you completely off the surface of the earth, but it is not so successful and only brings harm to you