When you attempt to download a file from the Internet by using Hypertext Transfer Protocol (HTTP) in Microsoft Internet Explorer, you may find that the download does not complete. As a result, you cannot download the file.
This behavior can occur if you try to download a file that is larger than 2 gigabytes (GB) in Internet Explorer 6 or is larger than 4 GB in Internet Explorer 7.Note
This download limit has been removed in Internet Explorer 8. Therefore, you should not experience this behavior in Internet Explorer 8.
To work around this problem, you can
configure a Web site that is dedicated to downloading large files. To do this,
disable the HTTP Keep-Alives Enabled
option for a Web site
that Internet Information Services (IIS) hosts. To disable this option, follow
- Open Internet Information Services Manager.
- Right-click the Web site that requires the change, and then
- Clear the
HTTP Keep-Alives Enabled check box
that is located on the Web Site tab, and then click
- The HTTP Keep-Alives Enabled option enables a
client that connects to the Web server to reuse the current TCP/IP session when it downloads all
content from the Web server. When you disable this option, an Internet Explorer client
then download files
of up to 4 GB.
also forces the client to establish a new TCP/IP session with the Web server
for every content object
that is downloaded from the Web page.
creates extra TCP/IP overhead for both the server and
the client which will adversely affect page load
- Windows Internet Explorer 7 can reliably download files up to 4 GB in size without the previously described change to the server. There is no workaround to enable Internet Explorer 7 to download files larger than 4 GB in size. Windows Internet Explorer 8 can reliably download files over 4 GB in size without the previously described change to the server.
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.
For more information about Internet Explorer, visit the
following Microsoft Web site: