Download problem

i download a patch for my game ..but when I start download it suddenly finish the download and the file is not completely download ...so ...why my download are suddenly finish while the file is not completely download ... ??

It could be a bug, or a virus. Or maybe it's a downloadable virus. What you are downloading might not be very safe. I recommend restarting your computer, or rebooting it. And try it again.

it could be a system error depending on what type of patching you are trying to download and what file it supports but that can be fixed