There are a lot of places one can insert a system-wide command to run on startup: registry, GPO, Task Scheduler, etc.. Does anyone know what the first place is that a boot script can be set? Bonus points for a list of all the places in sequential order.
I don't mean per-user or as-user, but system-wide. I do mean repeatable, upon every boot--not a one-time script. I'm asking with Windows 8.1 in mind but I'm not sure if this stuff has changed drastically since Win7 or earlier.