But, sometimes even the antivirus makes mistakes. For example, Avast (which is my personal worst AV, although it's free) didn't pick up a direct connection from USA botnet to my friends PC, which was installed from a Google Chrome extension.
How did I stop that connection? Here are the steps:
- Start "Command Prompt" (Win+R -> type "cmd" without the quotes)
- If you like the IPs exported to a file, type "netstat -a -> file.txt". A "file.txt" file will be created in the directory you are in.