Ok, thanks for the help.  The Boinc software is installed, and it shows an
item currently 41.97% processed, and it's still ticking over, so presumably
it's working.

However, how do I see any details?  There used to be a colourful graphic
showing the progress of the current work.  I can't seem to bring that up, or
even find out how many work units have been processed, or any other details.
Most of the options in the Boinc Manager programme do nothing when clicked
on.

I also still have zero credit, even though I've previously processed 588
work units.

Geoff.