This question should be asked in the Windows Answers Forum at the following address
http://answers.microsoft.com/en-us/windows
Anyway, read the thread at the following address
http://answers.microsoft.com/en-us/windows/forum/windows_7-security/error-code-0x80070424-with-windows-firewall/ec3fc3b8-69ec-4b4b-a703-4b745fe6e8ee?page=1
Bye.
Luigi Bruno - Microsoft Community Contributor 2011 Award