e:\AppData\Local\Temp could not be saved, because an unknown error occurred.
Try saving to a different location.
That is the error I get whenever I try to download something.
Are you clicking "Open" instead of "Save" when you're downloading? Trying pressing save, and saving it on the desktop. If it still doesn't work... try another browser.
Try popping your drive in another computer if you can. Try a different SATA port like everyone's said.