okay have been working and testing the Raspberry PI 3
Reinstalled a few times checked the SD for corruption / and the temp of the system without any problems…
next I checked the Power supply sometimes seeing a orange box in top left corner when it was stuck.
With other power supply same problem. after few minutes to a hour is was stuck again

I finally found the problem not in MM but running ‘memtester 500m 2’ I found there was I Failure in the memory
After going back to the store and getting a replacement PI the problem are fixed.
Thanks for the suggestions and maybe this will help some one with the same problems :)