sounds like the problem lies with your Acer laptop then. see if you can use the windows system restore to restore it to an earlier date when it was working.
Thanks for your suggestion. Meanwhile I have managed to get it working again, after rebooting the router again. Strangely, I had tried that before, as well as numerous other things, bt the laptop just would not see/connect to the home network. Anyway, all now seems to be wll again.