I have a live site running fine.
I have an Acquia Desktop Dev Stack running on my Windows desktop machine.
On many previous occasions I have imported the existing live site and run in on the Dev Stack.
I can still get my previous Dev Stack version of the site to open up.
BUT now when I try to go to the latest imported site, it appears to not recognize PHP.
Firefox tries to download the file.
Even when I try opening my "phpinfo.php" file from the latest import directory I get a browser dialog box