my pc configuration
amd sempron le 1250
windows 7 (32bit) ultimate(not genuine)
My problem is, sometimes when i boot my pc,the network status icon in taskbar shows an exclamatory sign in yellow colour and some text like this "no internet acces, unidentified network". But the Modem shows the green light. that means the net is ok. After a restart there is no problem at all. plz help me.