The entries in the GroupOrderList subkey specify the ordering of services within groups, under the following Registry path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GroupOrderList
For a service listed under CurrentControlSet\Services, the value of the Group entry plus any Tag entry determines the order in which the service is loaded. But not all services have a Tag entry, and not all groups have an entry in the GroupOrderList subkey. The ServiceGroupOrder subkey described later in this section specifies the order for loading groups.
The entries in the subkey are all of type REG_BINARY. The default entries that define the order within groups are listed below:
Base
Ndis
Primary Disk
Filter
Pointer Class
SCSI Miniport
Keyboard Class
Pointer Port
Video
Keyboard Port