Are you using a download accelerator? If so, don't use it for this download.
Second, the file may have been corrupted during the download. First, try re-downloading it. Before you do so,

* be sure that your browser is not set to automatically disconnect after a certain number of minutes of inactivity (in Internet Explorer, under Connection Settings, be sure that "Disconnect if idle for __ minutes" is unchecked.)
* consider disabling your screen saver, to ensure that it does not interfere with the download.
* if you have a lot of other programs running while trying to download, that may be the problem too. Stop or exit any unneeded programs.


If you've tried the remedies suggested and nothing works...
Try clearing your cached web pages:

* In Internet Explorer, select View/Internet Options, then, under "Temporary Internet Files", click "Delete Files,"
* In Netscape, select Edit/Preferences, then, under the "Advanced" category, select "Cache". Then click "Clear Memory Cache" and/or "Clear Disk Cache."

Corrupt files happen more often at peak usage times on the net, so try a time that has less usage----and would be faster.

Are you using dial-up for downloading? If so, connection speed could be the problem.