dnf hangs - looking for advice

[Timothy Murphy]

I've install Fedora-23 beta from a KDE Live USB stick,
and it seems to be working fine.
The installation went quickly with no problems.

However, on running "sudo dnf update",
all 542 packages were downloaded OK,
but then dnf hung after a few cleanups, at
  Cleanup: initial-setup-0.3.35-1.fc23.x86_64

I ran "sudo dnf clean all" and then update again,
but it just tells me
  Nothing to do.
  Complete!

Is there any way of completing the cleanup?
Or is that unnecessary?

-- 
Timothy Murphy  
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin