i had the same problem but i solved this by going to control panel / region/ then change format and locations to USA.
my set up before was Saudi Arabia .
now i am using windows 8.1 enterprise evaluations .
in windows 7 go to control panel / language and region / then change format and locations to USA.
note : i set up back to Saudi Arabia but the problem back again and then set up to USA and the download appears to be downloaded ok i downloaded some of windows and office and that was perfect .