Use a
full internet security suite from a major vendor such as
Avast,
Avira,
Bitdefender,
ESET,
F‑Secure,
G Data,
Kaspersky,
McAfee,
Sophos,
Norton,
or
Trend Micro.
Check independent reviewers
AV‑Comparatives.org
and
AV‑Test.org
to find the best of the best. If a security vendor isn't in these reviewers' lists, ignore it, no matter who else recommended it (phone company, TV, partner, friend, search,
spam message).