Re: Mr. Trevor Pott's analysis is correct
But here's the thing: There ISN'T any "death date" for Windows XP. It'll still work fine, even after the cut off date for official support.
Microsoft even extended support for XP, even though it was originally intended to stop it in 2009.
Everyone who bought a PC with XP on it, would have known, or would be told if they asked, that official support would end in 2009. That means that they would have had almost a decade to plan how to migrate from XP, and set aside the funds to do so.
That they didn't do this, or never thought of it, is neither Microsofts nor the retailers fault. Just like you can't blame them, when you visit a porn site that gets you XP machine infected.