Hey Wolfy,
Gsender has the tendency to have a slow initial startup when a windows machine has first booted. There have been many topics on the issue.
In this one sienci dev comes in and explains why things are the way they are.
I have read somewhere that excluding gsender in windows defender might help the issue a bit.
Can it be that you need to give gsender a bit more time to start up?
Mine takes a good few minutes too before the screen pops up. Enough time for me to run around and switch on other components of my setup and still having time to spare.
Does giving it a good few minutes help?
(I personaly like the retro startup times. Makes me feel young again)