My Outlook 2002 / Windows XP installation has got into a state where all
previous email accounts set up under Outlook or Control Panel/Mail have been
deleted, but now I can't add any new ones.

In both Outlook or the Control Panel/Mail thingy I can navigate to the
'E-mail accounts' dialog, where you're offered to add new or change existing
e-mail accounts (or add or change directories and address books). But if I
select

'Add a new e-mail account'


....then the dialog that appears has all five options for server type greyed
out, so I'm unable to progress. Similarly, if I select the option to change
an existing account but from that dialog select 'Add...'

I've tried uninstalling and then reinstalling Outlook. No joy.

Clues, anybody?