It's gotta be the file size. Not sure what you can do about it, though. Do you have enough room on your hard drive?
Alright so I just confirmed I have 2.29 GB of free space. When I attempt to download via Chrome it reliably halts at 40mb and then fails. When using Firefox it inconsistently fails but when it does complete and I unpack the files the executable is unresponsive. Internet Explorer reliably finishes the download but runs into the same issue of an unresponsive executable.