1 logon sign in fine, another does not

Hi,

I have set up a new Windows live logon and signing on just gives the
spinning bodies. Yet my daughter's logon signs in without a problem. So
there's no antivirus/antispam/firewall issue. The first logon is fine,
because I've used it to write this thread.

Anyone got any idea as to what the precise problem is?

Thanks,

Gezza