While it's rarely by default (I actually don't know any that do by default but), it is usually a simple checkbox during the installation. And a provided password, of course.

It's worse than that, lots of these linuxes actually have this builtin virus called wine, which means they are really just windows in disguise.

It also makes them look like a hacker to the FBI, that's why TYOTLD has never come. Most linusers are getting dissapeared to guano bay.

Far safer to stay on windows, linus is only suitable for real hackers who can grep their way into cia mainframe to expunge their records.