“Call CGI Error” appears when installing OfficeScan client remotely from a Windows 2008 server using IIS 7

This issue happens because of the IIS 7’s stream buffer limitation behavior. The CGI would fulfill the output stream buffer and send it all at once in IIS7, when it would send output stream separately and one by one in IIS6.

To resolve this issue, do the following:

1. Go to the %windir%\system32\inetsrv\config directory.
2. Create a back up of the applicationHost.Config file.
3. Open the original file to edit it and look for the entry below:

   <add name="CGI-exe" path="*.exe" verb="*" modules="CgiModule" resourceType="File" requireAccess="Execute" allowPathInfo="true" />

4. Add the following entry:

   responseBufferLimit="0"

   The lines should now look like this:

   <add name="CGI-exe" path="*.exe" verb="*" modules="CgiModule" resourceType="File" requireAccess="Execute" allowPathInfo="true" responseBufferLimit="0" />

5. Save the changes and then close the file.
6. Restart the WWW Publishing service.
7. Perform a remote install to check if the Call CGI error will still occur.

Should the issue continue to happen:

1. Download the CDT tool and run it on the target host machine.
2. Collect the logs and contact Trend Micro Technical Support for further analysis and assistance.