source: http://www.microsoft.com/athome/setup/wirelesstips.aspx#fbid=7zSOG5ZDjOa
If the Windows operating system ever notifies you about
a weak Wi-Fi signal, it probably means that your connection isn't as
fast or as reliable as it could be. Worse, you might lose your
connection entirely in some parts of your home. If you want to boost the
signal for your wireless network (WLAN), try some of...
