Well, yes, the driver update does that. But why?
The NVIDIA driver update program could have run in "God mode", i.e. having all the permissions of the system. Creating this account as a standard user (
not administrator) actually
limits what the program can do and makes it tracable (in task manager e.g.). Please read the whole
thread and especially post #7. It explains a lot.
You should not delete this user manually; do it by uninstalling the NVupdater program through the control panel. If you do it manually unpredictible results (most of then not good) could be the consequence.