You know the story: with hands on MIDI keyboards, wanting to start/stop Live one hits the Spacebar without even looking at the QWERTY. Because one touched the Windows Key, pronto, an unwanted Windows Menu that blocks Live. The flow is lost, interaction blocked, it's "still-without-looking-slam-the-QWERTY-hard-with-the-whole-palm-to-hopefully-hit-the-key-too-that-nukes-the-Windows-Menu-out-of-the-way" ("and-if-it-doesn't-at-least-the-frustration-got-vented") time.
I just discovered today that Microsoft has a FixIt that kills this nasty, nasty Windows Menu popup here. Mentioning this should be one Page 1 of every DAW's manual. If everyone knew this already except me, sorry then.