How do you stop a firmware update?

[AC Question]

how do you stop a firmware update

I want my update to stop but it is frozen and stuck

 

[VW Maverick]

Re: how do you stop a firmware update

Welcome.
Hold the power button down for 15 or so seconds to reboot it.
It will most likely alert you to the available update later, but it cannot be avoided.
What device and what update is it trying to do?

Mav.