Citizenship is usually determined by where your parents have citizenship or where you were born. In Mexico, if the parent has citizenship, the kids can be nationalized. China could be harder though, if the Chinese parent was an American citizen. I have no idea how they’d treat it if that citizenship was revoked, but the kids wouldn’t normally be citizens if a Chinese parent acquired American citizenship and had the kids born as Americans. Normally countries don’t get into revoking citizenship because everyone has to have a country or last resort who is obligated to take them. Would be a rough situation to be stuck in. If you have money, you can buy citizenship in a lot of places though. Lots of EU countries allow that too.
He may have been trying to install it on a potato or on something atypical. I struggled to get a clean Windows 10 install on a system with an old ASUS motherboard using its RAID controller and AHCI. Support didn’t seem to understand the problem, but they were a good sounding board while I figured it out over 3 evenings. By contrast, Windows 11 took all of 10 minutes to install with Rufus on a modern system. Sometimes you just end up with a system configuration that isn’t quite supported out of the box by a given OS, and it takes some third party drivers and some intermediary configurations to get things to load before you can get things working properly.