Not sure where to post this. I am in my living room with my laptop and my signal shows up as excellent and then over time, it drops down to poor. When I turn it on, it may be poor or exc. When I go to troubleshoot, it says there is no problem. My Laptop (Toshiba) is about 2 years old and I am running Win 7 and Explorer. My Router is about 3 months old and leased thru Comcast. Any help?