you can try this maybe this works for you but debends on your system/ environment
set internet explorer default page to “http://localhost:8080”
use windows key + r (run command)
type “shell:startup” (open a windows explorer)
create here a file with filetype *.bat (e.g. StartMagicMirror.bat)
@echo off START /max iexplore.exe cd C:\Users\MyUser\MagicMirror\ node serveronly
save an close and doubble click on the file, Internet Explorer should open and magic mirror should start.
Now you can restart an test