Windows Firewall is used by 1.25 billion people world-wide. We would trust something that has been used by over a billion people more than a third party firewall. Not that there is something wrong with Bitdefender, I’m sure it’s great but I also feel there is nothing wrong with Windows firewall and disabling it to use a third party firewall is not so great. Please note GlassWire does not disable the Windows firewall.
Download GlassWire for free and give it a try: www.glasswire.com