Since I have gotten Windows 8.1, there have been occasional drop outs of the wireless signal. Now it is becoming to frequent to use the internet at all. Sometimes it shows a limited signal to the router or it drops out completely and the router is also not visible. Both ways, I am unable to connect to the internet at all. There also seems to be no pattern in the drop outs and they seem completely random. I really need help because without internet, it's really hard to do any work at all!