I admit, I'm pretty dense when it comes to copyright/licensing topics, so here's the question: Is it legal to build websites/apps that simulate the Windows operating system and use icons and images which are copyrighted by Microsoft? I have seen quite some such as these webs/apps:

* http://windows93.net/

* https://98.js.org/

* https://winxp.vercel.app/

* https://desk.glitchy.website/

* https://play.google.com/store/apps/details?id=com.lr_soft.windows98simulator

* https://play.google.com/store/apps/details?id=com.visnalize.win7simu

* https://play.google.com/store/apps/details?id=com.MrToddy.Win10BUG

* https://play.google.com/store/apps/details?id=com.jesusdigitalrd.jpcsim

... any many more you can find on Play Store.