Hello,

first i was using Avast Free antivirus but it was too heavy on my computer and it was bloated so i uninstalled it

then i used no Antivirus and Windows Firewall + Spybot Tea timer for many years

then im using Comodo Internet Security (CIS) which is free SW and im quite happy with it. Especially im using it to:

- right click newly downloaded file and initiate scan by Antivirus, sometime i upload file to virustotal.com
- the integrated Firewall has quite alot of options and connections monitoring/logging. I advice anyone to enable so called "Custom Ruleset" mode which cause Firewall to ask what to do for every software connection into the internet. This way one can build rules and prevent SWs from unnecessary network connections.
- Sandbox seems good, it allows running potentially dangerous software isolated

CIS is amazing software for the fact it is free.