I have spent most of today trying to access 5G on both of my windows laptops. Yesterday it was fine. Today I can only get 2.4. I contacted technical help by phone and spent some time following instructions from the (trying to be helpful) technician. He was very patient but could not solve the problem. I can get 5G on my ipad. Also, I now have to be in the same room as the router to get even 2.4. Is there a solution to this problem.