AUTOMATIC NETWORK DISSCONNECTING ?

Hello

I’m having a serious problem with network, during using pc normally, the pc will be dissconnected automatically from network…
First it seems like you change thw Windows XP Style after that i get dissconnet and im not able to connect again in network because when i click CONNECTION File the windows it opens but it’ll dissapeared fast.. and to continue using pc i have to restart it cuz other way it won’t functions.. Give an idea, what is going on!