Solution 1: Download the file when there is less activity on the Internet.

For example, download the file early in the morning.

Solution 2: Download the file using a download utility such as the following:

-- Download Accelerator (Windows): www.downloadaccelerator.com

-- GetRight (Windows): www.getright.com

-- iGetter (Mac OS): www.igetter.net

Solution 3: Use the Internet while the file is downloading (for example, visit websites or send e-mail).

Solution 4: Delete the file and download it again using an Internet connection that is known to be stable.

The file is corrupt.

@DarkstaR @dziaku