A 100-year old cow in the mud is how a lot of Microsoft stuff works and apparently they think that's normal since it never improves. It's sometimes annoyingly slow on our windows 7 machines at work, plus general bugginess. This is why earlier I posed the question if it's always the browser’s fault or the OS? And why should they have to address the issue if it's the OS?
Microsoft is weighed down mightily with resource hoggish stuff running in the background all the time, not the least of which is "security" and virus software, plus constant communications with Microsoft servers and I would not be surprised a back door for even LE.