You might think so, but check the service configuration (services.msc) - on a typical Windows machine, you will find plenty of services running as SYSTEM. Basic

You might think so, but check the service configuration (services.msc) - on a typical Windows machine, you will find plenty of services running as SYSTEM. Basically, nearly all services that do not need to face the network (Windows has another builtin account for that, which I think is called NETWORK or NETWORK SERVICE on English versions of Windows).