This could be a driver problem. I'd start with updating all drivers you can find. If that doesn't help, reinstall the OS from the DVD. If even that doesn't help, try another PC, because it's a hardware issue then.
Hello i have a problem that when i try to call to some buddy of mine online on msn messanger and that person accepts or he calls me i accept both ways i am rebooted the same problem is with me in skype too hey buddies help me out what is this.....i have windows 7 ultimate operating system