They no longer sell or support it. Would they still come after someone who used an unauthorized copy?
For those answerers who think I want to do this myself - I don't. I don't have any particular need for Windows 98, or any other version of Windows - I use Linux. It just occurred to me that I didn't know Microsoft's policy on their obsolete products, and I was curious.

So far I'm seeing a lot of opinions, but no actual authoritative answers.
And to bvnseven: Obviously, depending on the answer to the question, it may NOT be a crime. If Microsoft has abandoned the product and doesn't care if people copy it, there's no felony. Or, put another way, if I thought it was a felony, then obviously I'd already have the answer to my question and wouldn't have needed to ask it in the first place.