thanks for this info ! Why does MS intend to fix this but still have a pop-up for 1 frame ? what is the point of interrupting our attention at all ... im not sure i know how long 1 frame is.... ?
One frame depends on how your system is built. Your computer draws a picture on your screen in a short time, measured in FPS (frames per second).
Any device that displays a picture from an electronic device has an update frequency measured in Hz (hertz), which limits how many frames can be shown. The Hz of a monitor varies from 30 Hz (or lower) to 300 Hz (or higher), which determines the max FPS for your computer.
A 30 Hz monitor shows one frame for 33.3 ms (milliseconds, 1 second = 1000 milliseconds) and 300 FPS is 3.3 ms. A movie is usually in 24 FPS (41.7 ms). A game runs with at least 60 FPS (16.7 ms) on a decent setup, and a good setup has 240+ FPS (4.2 ms).
So you could notice the explorer window displayed for one frame on a 30 Hz monitor, less on a 60 Hz monitor, and almost never on a 240 Hz monitor.