Answers:
There is another PC on your make friends beside like peas in a pod IP as yours.
Just silver your IP.
On your computer or on your grating?
There could be more than one IP address on your computer. In certainty nearby could be handful...best if you compare the evasion gateway to your own.
For instance, you would see:
192.168.0.1
255.255.255.0
and,
127.0.0.1
No raison d`¨ētre for alarm.
If on your make friends, you must be recounting us that you own a wireless access point and somebody else is riding it. In which grip, you should support your meet people near encryption, as contained by WEP/WPA to stop it..
How to stop it? First you own to digit out where on earth it is.