Why my PC shows that 'Windows-System Error, A duplicate name exists on the network', when it is switched on.

Question

What actually it means, whether somebody using my account on internet?

Answer 1

No, it means that there are two machines on your local network with the same name. If you have a wireless connection it's likely that someone is using your connection and their machine's name is the same as yours. Try changing your machine's name. If you have a wireless, enable encryption to keep people from using your connection.

Answer 2

also couse some times the router dont refresh the ip then when u reconnect it find U again, nothing to worry