Microsoft funded Apple to keep another OS vendor alive, so it's not about discouragement. It's probably a lot cheaper to fund a competitor than paying the gov't and getting tagged as a recognized monopoly
Quick summary: code from Apple’s QuickTime for Windows found its way into Microsoft Video for Windows. The Microsoft investment was the result of Apple winning a lawsuit.
https://www.zdnet.com/article/stop-the-lies-the-day-that-mic...