Installation using archive
This one catches me out all the time ...  it manifests itself as a hang or a seriously delay in loading up the available features when doing an install or update in the Control Centre. 
this *only* applies if you are doing it from an archive or file system. Ensure you uncheck the "Contact all update sites during install to find required software"
			
            this *only* applies if you are doing it from an archive or file system. Ensure you uncheck the "Contact all update sites during install to find required software"

 
            