Many thanks for yours reply Aussie,
I tried what you suggested and it has worked--somehow.
This is what happened: I went into Mand control panel and turned off portmap---at least I think I turned it off.The radiobutton equivalent in Mandrake is small square icons.It can look empty or full when clicked on--I assume it is "on" when it looks empty?Any way it was"empty" and I chnaged it to "full".
On shutting down, it froze as before but this time sooner--immediately afterclicking on shutdown!
SO I powered off and rebooted and reset portmap to the "full"apperance it the problem went away!!
I do not know how it got fixed though!!
BTW which is the "on" state for the button?--"full" or "empty"?
(bet that takes the prize for dumbest newbie question)