To join your computer to a new workgroup, Connecting Your Computer to a Workgroup
In Control Panel, click System and Maintenance, and then click System.
In the System window, under Computer name, domain, and workgroup settings, click Change settings. In the User Account Control dialog box, if you are logged on as an administrator, click Continue. Otherwise, enter an administrator password, and click OK.
On the Computer Name tab of the System Properties dialog box, to the right of To use a wizard to join a domain or workgroup, click Network ID.
On the first page of the Join a Domain or Workgroup wizard, with the This computer is part of a business network option selected, click Next.
Select the My company uses a network without a ...