Just out of curiosity I invoked Microsoft Update on my XP box, which had already gotten its “final updates” a few days ago. It still had Bing Bar available and permitted me to apply it.
It’s probably cheaper to do this than it is to take the IRS boxen forward to another version of Windows.
They could consider using Linux, I guess.
Consider the upside. No one is going to develop malware for a “dead” operating system.
XP is going to be more secure now that Microsoft has proclaimed its official obituary.