Default on every new installation Windows automatically creates a workgroup and gives it a default name WORKGROUP. Computers on a workgroup can easily share common resources and responsibilities such as file and printer sharing.
Ideally, a workgroup should not exceed 15 computers, anything exceeding that amount tends to become too difficult to administer and mange. In Windows 7, you can create a new workgroup or join an existing workgroup which automatically enables file and printer sharing.
To find out what workgroup a computer belongs to click on START ==> CONTROL PANEL ==> SYSTEM AND SECURITY ==> SYSTEMS. Alternatively you can also right-click on MY COMPUTER icon and select PROPERTIES which will bring up the identical page.
Notice in this example, the workgroup the computer belongs to is label WORKGROUP. This is default on all computers unless it was manually changed.
To change workgroup settings select CHANGE SETTINGS or click on ADVANCE SYSTEM SETTINGS on the left column. Press OK if you are prompted by UAC. To completely disable UAC, click HERE
Navigate to the COMPUTER NAME tab and select CHANGE at the bottom to change the workgroup name. In this example, we’ll change our workgroup settings from WORKGROUP to HOMEUSER, you can name your workgroup anything you like. Next press OK to complete the process, the system will need to reboot to finalize the change.
Enjoy..