What is Reddit's opinion of Firewall App Blocker?
From 3.5 billion Reddit comments

➔ Firewall App Blocker website

By popularity on Reddit, this Service is:

#45 in Firewall apps

1 review of this app found across Reddit:

You can use this application to simplify what programs are blocked by the firewall. Simply drag and drop what you do not want to connect.

Also, disable all of your startups, except your antivirus.

Then, disable scheduled task as well, these tend to search for updates for shit.