HwKeeper
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Proton VPN is blocked in Russia. Even if you download the program from a third-party resource, you won't be able to create an account. I had to use another VPN (a browser extension) to access the Proton VPN website and register. I entered my login and password in the program, and nothing happened for a long time, and then it displayed a window for solving hypothetical problems.
In any case, thank you for informing me; I'll look for a more accessible VPN in Russia since this one is also partially unavailable.
I'll update the main post later when I've tested a couple of new VPNs.