why is my 2004 simulator wont initiate on windows 10

Did it ever?

If not then I would uninstall it, clean it out and reinstall.

This is a uninstaller that many members have used.
https://www.revouninstaller.com/revo-uninstaller-free-download/

There are hidden files and folders and registry lines that have to be cleaned out, this will do it.
Let us know what you decide.