Not sure. but when you say you have the same problem on the iPhone, I wondered - are you using the iPhone with Wifi? If so, does it succeed in downloading when you are using 4G data away from home?
Yes to both of those questions would indicate a problem with your Internet. Don't know if it's the service, the router, the Wifi.... Is the PC attached via wire or Wifi? Again, the answer being "Wifi" would be a clue.