The difference between the Local System account and the Network . . . NT_AUTHORITY\LocalService (aka the Local Service account), or NT AUTHORITY\NetworkService (aka the Network Service account) That capability only was added with Task Scheduler 2 0, which only exists in Windows Vista Windows Server 2008 and newer A service running as NetworkService presents the machine credentials on the network
Should NT AUTHORITY\System be granted the sysadmin role? One solution is to change the SQL server security settings and grant an appropriate role to the NT AUTHORITY\System user which allows a process running as the localsystem user to create the database