it might need either a new hard disc or 2 take it 2 sony's service center or workshop or whatever it's called so they can check the modem ... etc.
here is a good link to help with possible bad connection and port settings. Read this and it should fix some major issues .
my bro says routers' settings differs from 1 another try 2 google ur router's name & how 2 open ports. my bro changes his router's settings by entering a website that is made especially 4 it. idk f ur router use the same idea.