So if - hypothetically speaking* - I download a document that I've emailed to myself on my work computer, and spend a happy hour or two editing it (hitting 'save' every five minutes), then you think I mean 'save to a temporary folder which is then emptied, purged and lost forever when I turn the computer off to go to a meeting'?
Interesting choice, IT people/Windows, interesting choice. It didn't at any stage occur to you to save the document by default to, say, the desktop? Or My Documents?
*by which I mean 'just now'.