OK I’ve run out of ideas.
When trying to browse to google.co.uk on my wife’s computer gives the error “This page can’t be displayed” This is on Windows 10 with both IE11 and Edge.
Youtube.com, google.com, google.au, google.de and gmail.com all give the same error.
All other computers in the house connecting to the same router can connect without any problem.
I have run a number of virus scans (Malwarebytes, ADWCleaner, superantispyware) all come back clean.
I have cleared cookies, replaced the HOST file and flushed the DNS cache. But still no joy.
Running IE without addons doesn’t work either.
IE Inprivate browsing works fine as does Firefox.
Any clues to what I should try next?