To determine the name of your PC.
Click on the Start Button, this will bring up the Start Menu.
From the Start Menu, right click on Computer, this will bring up a second context sensitive menu.
From the context sensitive menu, select Properties.
This brings up a window that allows you to View basic information about your computer.
In the bottom third of the window, look for Computer name, domain and workgroup settings section.
Computer name is the first entry in this section.