so as it seems to be solved for me its closed.
but i wanted to let you know about something i found out:
when using
System - Disable Paging File
and you go to windows features, i get this:
and it says "please wait" for maybe 15 minutes or more (at virtualbox)
so i mostly restart the VM and after that it takes maybe 5 minutes so the features will be displayed.
but when i set the pagefile to 16 MB the windows features are displayed in less than 30 seconds