Thanks to Michael for pointing this out.

Your Windows Live ID is your passport (no pun intended) - it’s the key to a world of services (not just Microsoft – a number of third parties use LiveID as an authentication method) and you should treat it as carefully as your ATM PIN.

The Windows Live team have posted some pretty straightforward bits of advice to help keep you safe – check it out before you next log in…

Some services – such as Microsoft HealthVault – enforce some of these requirements, and sites like PayPal are encouraging users to play it safe.