Unfortunately, there is no 'magic bullet'. If you are still running Windows XP, it would be a good idea to make it as secure as possible. Nobody knows what will happen next, but malware writers are expected to target the remaining machines.
Microsoft has shipped its final update for Windows XP, which means all the new security holes will not be patched.
What actions should they take to minimise their exposure to attack, while they consider their options/save up? Whitesocks My bet is that the vast majority of the Windows XP users reading this did not update their computers/operating systems by 8 April.
