Re: trademarks
There were likely no other software products called "Windows" at the time, so they could trademark it in that context. Apple Computer and Apple Corps could coexist as one was computers and the other was music - although at the time of the resolution, Steve Jobs' company was to keep out of the music sphere.
MS have fallen foul of trademarks themselves - ever wondered why Win 8's Metro UI was renamed Modern UI? Sometimes, the little guy wins (especially when it's European courts, the small guy is a European company and the big guy is a US company already in hot water with European courts).