See http://support.microsoft.com/?kbid=307859 "How to change file
associations in Windows XP".

abfabrob wrote:

I read a document and clicked on an attachment. It was an Acrobat attachment,
but it opened the document in Word - so it made no sense, it looked like lots
of random characters. My PC has acrobat... Now every time I try to open
someting in Acrobat or even a web link, it opens in Word!!! How can I change
this?

Any help much appriciated, this is driving me mad!