Please name some free antivirus es?

If you are using glass windows I’d recomend the next.
Avast Free Antivirus
link:http://download.cnet.com/3001-2239_4-10019223.htmlspi=6affbc4389b1a405590529f03ab34939

Avira AntiVir Personal
link:
http://download.cnet.com/3001-2239_4-10322935.htmlspi=cb6048ad81c956c24c2002d9a12d932a

If you are using linux I’d recomend a person
clamwin antivirus.With Ubuntu the link is very useful that ubuntu software program hub.

1 avira
COUPLE OF avg
THREE OR MORE avast totally free type (better)
FOUR comodo (good)
SOME adware
SIX bitdefender totally free type (best).