This how-to article details the process to change the Workgroup in Windows 7 which allows for sharing of files and system resources over the network.

1. Click on the Start button in the bottom left, then right-click on Computer » Properties.
   
2. On the new window, look for the section labeled Computer name, domain, and workgroup settings and click on the Change Settings button to the right.
   
3. Allow or grant permission if prompted, then on the new window click Change.
   
4. In the Workgroup box, erase the name of the Workgroup (Shown below as WORKGROUP) and enter the workgroup name to join.
   
5. Click OK and if prompted, restart the computer to complete the change.