How to change IP address of my labtop , using Vista software?

Dear tassas

If you use a network to access internet, disconnect from the network completely, and log in at a later moment.
If you use any format of telephone or cable connection : disconnect complete, and log in 5 minutes later.

;)

Your Q is vague and no OS was provided...

Disconnect (release) all connected PCs. On the PC listed above, go to START > enter "cmd" @ the Search field, enter "ipconfig/release" & "ipconfig/renew". The PC will get up a new IP.

Alternately, you can manually enter (vs automatically obtain an IP) a new IP address at the NIC (IPv4) TCP/IP Property...

P2E