How can I fix the problem when another computer is using the same IP address with me?

My computer has proven to me that there is another computer using my IP address.

He said I need to contact the administrator.
I don't know how to do in this regard. Help, please.

Since it's your own home network, it means you are the network administrator. Which basically means that you should have total control on who can and can not connect to internet through this network.

Then, you should have a router somewhere in your House. This is the device that sends the wireless signal. Most likely, it will be connected to a phone jack or cable from the wall, or a modem, depending on which company you get your internet service.

You need to find this device, the router and restart for it. Do the same on your computer. Once both have restarted, try to connect to the internet. The router must have an ID written somewhere on it. This same ID should appear in your network and sharing Center , if you click on "Connect To A Network.

The homegroup is something a little different. A homegroup is really just a collection of your own computers, or in your home. For example, if you had a desktop and a laptop, and I wanted to share the files from one to the other, you should join them in the same homegroup. It has nothing to do with putting on the Internet, just the connection of two computers together. It of good that you set up a homegroup with a password, but won't really help you here.

Tags: Windows

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