Windows Update error 8024402C (Windows 7)
It took me a while to fix this issue but if you follow exactly this document from Microsoft
you will be able to understand the error and fix it too.
The problem is the fact that the updates may be handled by a WSUS server. To find that out go to
programs ->Windows updates and locate the following
The only way to run update is by clicking on the link that is just underneath the "Managed by you system administrator" titled:
Check online for updates from Microsoft Update Service.