It's not clear what elements you're referring to.
Strictly speaking, you must have copyright or authorization for all the resources you use in a game you upload to Itch, but it's not even clear to me what you want to do.
Upload a game? Share an image? Share the 3d maze screensaver application?
If your idea is to redistribute the "3d maze" application with an image created by you, we're talking about a red flag, a Microsoft application, although old, will surely have copyright (I don't think it is this, because surely an application for Windows 95 will give many problems to run on a current Windows).
In practice, I doubt that Microsoft cares about that copyright, but legally, you wouldn't have the right.
I don't know if it's time (I'm dead tired), but I can't understand exactly what you want to share