Duplicate IP Adresses
My roommate and I have a problem. We have the same IP address. This started a few days ago and I don't know how to change the settings, preferably automatically. He has a desktop and I have a laptop.
Just to rule out a basic misconfiguration, go to the command prompt and type
if this doesn't fix it then, go to Network Connections (Vista/7 go to
Now, right click on the adapter you are using and find 'Internet Protocol Version 4 (TCP/IPv4)`.
Make sure automatic is set for at least the top one and your alternate configuration, unless you have a reason to have it manually set.
If there is a reason you need a manual address (Such as no DHCP source), consider simply changing the last number in the IP to something that no other device is using.