Thanks for your suggestions.
I've not updated since because the problem has not happened again until Tuesday.
When the Internet on my Desktop died, but once again my Outlook E-Mail was fine and my Wi-Fi on my phone and on 2 Laptops was also OK, Baffled !!!!
I could not find the instructions I was given here, so when I got back on line I wrote them down.
It happened again tonight so I followed the instructions given here, screen shots below.
When this happens the only way to get back on line is to re-boot then on re-start it's back.
It was off for 2hrs tonight until I re-booted, all the time it was off on my Desktop my Laptop a few feet away was downloading at a steady 300/500kbs, strange...Not Connected.Connected.
Any help greatly appreciated....