which antivirus is good ?

Small_Tarzan

Estimable
Sep 24, 2015
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Avast = No
Kaspersky = Not a bad idea
Norton = Too annoying

I use MalwareBytes Anti-Malware. Which is not an antivirus. But you have one already installed on your system. Windows Defender...
This combination, WD and MBAM is really good.

I hope this will help you.