Answer to query.
Apologies for not responding to this problem earlier - I have been at
university back on XP and forgotten all about it.
Basically this problem is due to a piece of non plug and play hardware
in Vista being deleted and thus not detected on a restart (as a plug
and play piece would).
The only problem is now I'm at university I can't remember for the
life of me which one it is. However, I'll be posting this back
tomorrow as soon as I get remote access back to my Vista PC at home.
Once again apologies to all,