Windows Update fail with error 0x80072F78

When using Microsoft Update or Windows Update to update Windows XP or Windows 2003, the following error may occur:

Windows Update has encountered an error and cannot display the requested page. You may find the following resources helpful in resolving the problem: Error number: 0x80072F78

In most cases, error 0x80072F78 can be solved by deleting the contents of the SoftwareDistribution directory.
To do this, follow these steps:

1. Click Start, click Run, type services.msc and click OK
2. Double click Automatic Updates, click Stop, and click OK
3. Open Windows Explorer
4. Navigate to C:\Windows\SoftwareDistribution
5. Delete all contents in this directory
6. In the Services window, double click Automatic Updates, click Start, and click OK
7. (re-)Start Internet Explorer and run Windows Update again.

If Windows Update still fails, you may try any solution supplied by Microsoft on this site:
http://support.microsoft.com/kb/836941