Are you nearby the router, or are you far enough away to have connection issues?
If you are on the opposite end of the house as the router (even more so if it is the ISP provided router) then that can simply be a wireless signal problem and every computer could have that problem.
Plug the laptop directly into router with ethernet cable to eliminate any connection problem and then let it run for a few hours (possibly overnight if you have a slow internet conenciton ) to allow it to backlog windows updates.