What if somebody wrote a virus that infected windows computers to replace the OS with linux?

Even if it were possible, personally I wouldn't recommend using it as it would violate/contradict the system of trust and autonomy

Forcing the belief of:

• "you have to use Linux because I believe it's good"
  • "because I believe x means you should believe y";

onto someone makes that idea inherently untrustworthy and the foundations of its origin would be unstable.

My recommendation is that if you want people to use Linux or something because you trust it and want others to benefit in the same way; then it's existence and systems contained within it should act as proof itself and shouldn't have to be forced onto others

• similar to opt-ins rather than opt-outs