Ask HN: What's the best antivirus tools for win10?

Windows Defender is a very good choice, and has the advantage it's free.

Windows Defender with a firewall on whitelist mode.

Common Sense (tm)

It's free!

I've used Windows Defender and I didn't had any issue so far (or I didn't saw it).

An ad blocker, and learning not to install things from dubious sources.

Linux?

I tried about 10 different ones.

The final conclusion is that we should be as preventive as possible within the first steps.

This is where uBlock Origin comes in.

If the download bypasses the above extension, then use a combo of MBAM( malware) or RogueKiller( malware)+ZoneAlarm(anti virus and firewall)+ Cleaner( junk can be taken advantage by malware).