Have you tried different channels on your router or changing from 2.4 to/from 5 GHz connections? Are you sure your network isn't overloaded (if too many devices connect to an overloaded router, connections will become unstable). Is there anything near it that may be blocking the signal (hard concrete wall, metal box, etc.)? You could try re-positioning the box to be closer to the router. Do any other devices have issues connecting or is it just this device?