[ArtisticSoul23]

definitely AVG for windows .... for linux it is necessary to install an antivirus ? I have always seen that it is a topic of discussion

[TuringMizar]

Most people have best Anti-Virus in their own head: brain and common sense

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or just use linux

Ever heard of Linux malware? It actually exists and many people forget about it

[5kidw4rd]

Windows Defender seems fine for windows.
If you need it for Linux, clamav/clamtk
Not sure about mac but I think clamav is on that too.

Malwarebytes (free version) is a decent one if you want to have a backup

[Liguma]

Malwarebytes for Windows

[wooK]

windows defender and common sense
given that anti malware services work mostly by checking hashes and to a smaller extent sandboxing and checking the behavior of unknown programs it is best to just use the most popular anti malware services (which would be windows defender or clamav on linux)
i dont know why people are suggesting malwarebytes
unless it does something special or has a significantly larger database of hashes i dont see the point
virustotal is also a good resource to use on files before you run them

but the real best way to avoid malware is to just not run anything suspicious on your computer

[Darth_Vader]

Malwarebytes or just windows defender I'd say.

[Donatello]

As they have said, best antivirus is yourself. I remember when I was younger, my friends had 2 installed

[utugatu]

had some experience with defender for endpoint, it's pretty sound combined with microsoft defender

[neoco284]

avast for me, the best

[AmeliaBeaumont]

Windows Defender and yourself.