I cannot sign into Norton Identity safe, it has been fine until today 7th June 2017, Norton is 22.9.4.8, Firefox is 53.0.3, 64-bit on Windows 10 laptop in UK, everything has been OK until today, ID safe says sign in but won't open, Norton keeps telling me to sign in to Norton, what is happening? Has Norton got a virus? I have updated, scanned, rebooted but nothing still the same, anyone have any idea?