Sony MPKTHE - Manual (Page 19)

Linking Computers and Peripheral Devices
17
6 Click Next. From the wizard’s Computer and workgroup names screen,
establish a unique name for your computer and for the network group to
which it belongs. The unique computer and workgroup names identify each
computer on your home network. All computers on your home network must
be assigned to the same workgroup.
The default name for your Internet gateway computer is VAIO. If any other
computer on your home network has the same name, neither computer is
able to connect to the home network.
The default workgroup name is MSHOME. If your computers are assigned
to different workgroup names, they cannot be linked together on your home
network.
Computer and workgroup names screen (Home Networking Wizard)