I did all the trouble shooting, checking my wifi, which has 5 bars, clearing my cache, deleting my profile. What my main problem is, is that now xbox live is really laggy, nobody else is using the wifi but me. There isn't any reason why it should be slow, or sign me off. I just recently encountered this problem.
There is one thing I noticed though. I have a white xbox wireless adapter and the old xbox elite black 120 gb. Whenever I sign on now, the white adapter doesn't have a green light as soon as I signed in automatically, like it use to. It recently has to be unplugged and plugged back in to get the green light and work properly. If I leave my xbox on idle for too long, the wifi will turn off too, I mean the green light on the adapter. I suspect the problem is with the wireless adapter. I use to have it plugged into the back, now I put it in one of the front usb ports to make it easier for everytime I have to unplug it and plug it back in.
Is there anything I can do? Is my console going bad not accepting the adapter? Or is it the adapter itself? What can we do to check this or fix it? Thank you.