Apologies for waking mixture, here, folks, but this is what 'TechRepublic' has to say today.
Yup... as the article summarises
At this point, spending no money isn't really an option -- it's just a matter of whether you spend the money to proactively address the situation or spend it cleaning up the mess after it's too late.
Keanini summed it up the pervasive threat of Windows XP: "Hunt down expired versions of XP and terminate it!"
So you lot of clinger-ons.... dump XP ... replace it with 7/8/Mac/Linux.... what I've been saying all along !