For Windows Vista 1. Open the Start menu, and
type cmd in the text box then
click OK.
2. The command prompt
window will appear.
3. Type ipconfig at the
command window and press
Enter to view the computer’s
IP information from DHCP
server.
4. If the computer is holding a
current IP address, type
ipconfig /release to let go of
the address, then type
ipconfig /renew to obtain a
new one.