Downloading and booting method and system for a wearable medical device

A wearable medical monitoring device for managing timing of software updates according to functions being performed by the wearable medical monitoring device, comprising:

• a plurality of sensing electrodes configured to monitor a physiological parameter of a subject;
• and
• a monitor coupled to the plurality of sensing electrodes;
• at least one processor disposed in the monitor, the at least one processor configured to execute a plurality of instructions to implement an update manager, wherein the update manager is configured to
• receive a software update corresponding to at least one software module for the monitor,
• determine a time period to effect the software update;
• determine if the software update affects a critical function of the wearable medical monitoring device;
• delay the time period for installation of the software update based on the determination that the software update affects the critical function;
• and
• effect the software update based on the determination that the software update does not affect the critical function.