hello, recently my computer have several dial up connection problems. After I format my computer, and reinstall my internal modem driver. Every time I click to connect to the internet, it displays an error message: either Error 676: The phone line is busy or Error 680: There was no dial tone or sometimes, saying it is hardware failure. The thing I am sure is that the line is not busy and there is dial tone. To connect to the internet, I have to let it redialing for like 30~40 times (uncertain). I once dial the number by phone, it get connected easily for the first time (I mean I can hear the sound of the internet connection.) Then I hang up, and try to connect on my computer again, but failed. And, I also test to change to dial number to call to my mobile phone. The same result I get - the phone line is busy. Strange~ As well, my computer called to Netherlands last month by itself~! cost me twenty dollars. That's an international mobile phone number, the number is 31620101164. How to find out this kind of hidden dialer in my computer? Thank you.