Could it be that easyspace (?) have made some sort of change at their end (some DNS change perhaps) that is slowly going round the various ISPs - hence some machines see it and others don't? Do you perhaps have a different ISP for the laptop and the other machine? I've seen it before where I can not see a site on one ISP but can from another when using the same machine.

I cannot access your index page or your links page with my machine (IE6 - Windows XP) but an educated guess led me to http://www.greenhedges.com/harmony.htm page and onwards to the /cobol.htm, /music.htm, /HOME.htm. Links from those pages to /links.htm and /index.htm still do NOT work.

I'd try your webhost and see what they are up to!