http://bugs.winehq.org/show_bug.cgi?id=27048
--- Comment #10 from Dan Kegel dank@kegel.com 2013-07-04 11:57:18 CDT --- Now that I don't need ie7 to get here, I can confirm that 'winetricks wininet' does not help.
The problem seems worse than it used to be; now the download usually restarts from the beginning, so retrying repeatedly doesn't help anymore?