You seem to be fixed on #6. The problem is that you don't understand #1.
#1 doesn't require that there be no competition, only that you have enough influence to control the market. MS has shown in many ways that they had or have that level of control, though I will admit it is eroding.
At the time that MS had a near 100% lock on the browser market, it was obtained because of their near lock on the OS market. That is monopoly power. At the time that MS bullied the PC makers into purchasing a license for every PC they made, regardless of what it shipped with, that was *absolutely* monopoly power.
And currently, MS still holds monopoly power over the non-apple hardware desktop OS market. You really can't convince anyone that there is a statistically significant number of non-windows desktop OS installs on PC hardware.
There's also some argument that they have monopoly in the office software market now. They hold the lion's share of the market, and those small few that do compete live and die by their ability to read/write MS format files.
As for the server side, MS never really had monopoly there, and probably never will.