“rim’s example will make your process run with SYSTEM credentials and will thus give you complete control of the system (SYSTEM has more privileges than any Administrator), but it doesn’t mean you’ll run in kernel mode”
Not only not kernel mode (which would as he said be no use to you anyway) but also not a true admin either it does have some elevated privileges (and full control of most files) but it is limited in some subtle ways, the main difference is that it is a local only (no privileges on the network) and service only (no interactive logon) which is why you have to trick the system to run cmd