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Help Firewall
Help Firewall
Is in italian im sorry! please help!
You're going to have to post this in English I'm afraid, unless @Liz knows what its saying 
Error Code 0x80070424 with Windows Firewall, Defender in Windows 7 - Microsoft Answers
This should solve your problem. More than likely you downloaded a malware/viral program that deleted certain registry entries.
This should solve your problem. More than likely you downloaded a malware/viral program that deleted certain registry entries.