Attachments

I am unable to open any attachments received
with e-mails. I have downloaded Adobe
Acrobat Reader and I have tried dragging the
Stuffit Expander file into the Systems Folder
but to no avail. The Technical Advisor in PC
world advised me togo to your website and to
search for mac archive program which I could
not find even using the search engines. Can
you advise on the software I should be using
or alternately what I should do to get the
software I have downloaded to work? Would
appreciate any advice you can offer?
Many thanks and look forward to hearing from
you.
Maureen Blacklaw