It is a good idea to check with the manufacturer's web page once in awhile for any updates. There are many reasons why you might get disconnected from the internet. The most common are listed here on this page. Line noise is caused by anything disturbing the phone connection between you and wherever you are calling. Extension phones, telephone extension cords, and loose connectors have all been known to cause line noise.
Inclement weather are another leading cause of connection problems.
On rainy or humid days, moisture in telephone junction boxes can wreak havoc on modem connections. Sometimes telephone lines swaying in the wind can create enough line noise to drop your connection. Remember, no matter how new your computer system is, you are still trying to connect through copper lines and equipment designed for voice use. The basic rule is, try to keep your computer the only equipment on your phone line. Don't use phone extension cords unless it is absolutely necessary.