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Task Scheduler will no wake the computer this can only be done with the RTC alarm feature. Wake from RTC is not supported on the Intel® Compute Stick STK1AW32SC.
Power State - Always Off/Always On indicate to the following behaviors;
Regarding your last question, yes, the C states are turned on by default after installing this BIOS version.
Find more information regarding Task Scheduler here; Task Scheduler (Windows)