I have the same issue. I am using Outlook 2010 as the sending e-mail via a POP3 server; d I'm receiving on gmail reached via the latest Chrome browser.
In addition to not being able to open these attachments at all - see error message described by first poster -- I do not have a choice between 'view' and 'download' on attachments from any source. I've read the directions and the set of instructions for creating a URL link to the attachment seemed ludicrous. Formerly I had both 'view' and 'download' so I'm wondering if the new AVG virus software has changed one of my settings.