I have enabled the WPA-PSK security on my belkin N= wireless modem router. All laptops in the house connected easily to the router, but one. AN MSI laptop stubbornly refuses to connect properly using the WPA-PSK key. The connection is establied but I get the "limited or no connectivity" icon (I have entered the key several times to make sure it is correct) If I turn off the security the laptop is able to connect without any problems. This laptop is running windows xp but an older windows xp laptop also connects without any problems. Any suggestions as to what the problem might be, please.