I got a HP notebook HP-2000 to replace my Acer notebook. The Acer used Optimum Wi-Fi in my house showing 5 bars at all times. After connecting my new HP notebook, I got a weaker signal with only 4 bars illuminated. I was able to get on-line, but the signal always fades so I lose my internet connection which returns at a later time. What is the problem? Why is the signal fading? The Router is only 6 feet away from the notebook. Thanks for any help.