Problems opening PDF Files as e-mail attachments! Help

I just got my new Dell XPS notebook with Windows XP Media edition.

My question/issue: I cannot open adobe PDF files that are e-mail
attachments. This is strange for at least two reasons: (1) I have downloaded
PDF files from the internet with no problems; (2) My older desktop has no
problem opening the same PDF file (an e-mail attachment) but I cannot open
the PDF file via my XPS (same e-mail, same file). When I click to open the
file, the Adobe program begins to open and then NOTHING! It says "finished,"
but it is completely blank.

Anyone know what is happening and what I can do to fix this? Is there
another forum I should direct my question to?

Thanks,

John Dennis