If you have the Brave Browser installed on your Windows devices, then you may also have Brave VPN services installed on the machine. Brave installs these services without user consent on Windows devices.
Brave Firewall + VPN is an extra service that Brave users may subscribe to for a monthly fee. Launched in mid-2022, it is a cooperation between Brave Software, maker of Brave Browser, and Guardian, the company that operates the VPN and the firewall solution. The firewall and VPN solution is available for $9.99 per month.
Yes, prove me wrong. As long as your running a up to date system there shouldn't be anything that could be easily compromised.
I've been using Linux (and UNIX) professionally since the kernel version started with a "1." I have no need to try to prove anything to you. Linux has installers other than just those invoked by a package manager, and it is laughable that you claim otherwise.