Windows was a Steve Jobs creation that Bill Gates legally ripped off. He should have covered his behind had signed an NDA before letting Gates in to see his creation/ideas.
Xerox PARC invented the mac/windows/gui style user interface, not Jobs. Jobs lifted it from them. Gates lifted it from Jobs and PARC after it showed promise.
You cannot copyright ideas like this and and most of the concepts were prior art so (assuming the patent office was competent, which it isn’t) no coverage there.