[Dalewyn]

Fun trivia of the day: Program Manager existed as a 32-bit binary from Windows NT 3.1 through Windows XP SP1.

Yes, you could get Windows XP SP1 to boot into Program Manager instead of Explorer if you so desired, and I would wager probably through Windows 10 32-bit too if you copied over the required files.

[BirAdam]

I actually used that too, and then SP2 blew it away, so I left Windows for Linux.