You cannot check for updates to the broadband networking software after you install Windows XP Service Pack 2

After you install Microsoft Windows XP Service Pack 2 (SP2), you cannot check for updates to the Microsoft Broadband Network Utility (BNU). On the Help menu for BNU, when you click Check for Updates Online, the Broadband Networking Update Service Web site does not load.

This problem occurs if the Autopost.htm file for Broadband Networking does not contain a Mark of the Web comment line. When Internet Explorer loads the Autopost.htm file, Internet Explorer searches for a Mark of the Web comment. If a Mark of the Web comment is present, Internet Explorer reads the URL and uses the settings for that Internet Explorer zone to determine what security policy to apply to the Web page. If a Mark of the Web comment is not present when you check for an update, Internet Explorer unsuccessfully searches your local network and your computer for the Broadband Networking Update Service Web site.

To work around this problem, add the Mark of the Web comment line to the Autopost.htm file:

1. Open a text editor such as Notepad.
2. Open the Autopost.html file. It is located in the following folder:
   C:\Program Files\Microsoft Broadband Networking\Autopost.htm
3. Position the insertion point at the start of the HTML code, and then insert two blank lines.
4. Type or paste the following line in the first blank line of the Autopost.htm file:

   <!-- saved from
   				url=(0054)http://www.microsoft.com/hardware/BroadbandNetworking/
   				-->

5. Save the Autopost.htm file, and then quit Notepad.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about using the Mark of the Web comment, visit the following Microsoft Web pages: