Are you trying to install Samsung stock firmware using ODIN and getting stuck at fota.zip?
This will happen on newer devices like Galaxy S7 Edge, Galaxy S7, Galaxy S6, etc…etc… The reason why it gets stuck is because you are using older version of ODIN.
Make sure to use ODIN v3.12.3 or higher to fix the problem, you can download our working version of ODIN v3.12.3 below and try to re-install the stock firmware.
Download: