How SIOS binds a per-seat licence to the machine itself, enforces its own expiry with no network, and refuses cloned drives and rolled-back clocks.
You stop it by binding the licence to the machine hardware and letting the licence enforce its own expiry with no internet. In SIOS the seat is tied to a hardware-rooted machine identity and carries a rollback-resistant offline timer, so cloning a drive to another machine, swapping in a forged key, or winding back the system clock all fail closed.
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