Cannot install Medieval Total War 2 gold

[muzzy2222]

hey

i have purchased and downloaded medival total war 2 gold
but when i go to install it the download wizzard starts then
it says that an additional file is required to install this game
so i tell it to download it and it keeps saying that it can't because of the
internet connection at different points during the download
the file is something like m2tw/medivaltotalwarII_mov.001
so can anyone help