The login screen and start menu both require a key press to start the process (enter pin or start typing search term) and both then drop all subsequent keystrokes for an indefinite period until they’ve finished initialising, displaying, and maybe phoning home and loading ads. It’s infuriating. It turns a simple open-loop “press win key, type search term, enter” into “press win key, wait for visual confirmation, type” which adds both computer latency and your own reaction time to the overall time taken.