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See if this MS Fixit will do anything for you http://support.microsoft.com/mats/windows_firewall_diagnostic/It could also be worth running Shane's Windows Repair given the problems you have which will also repair the Firewall.
This could be your problem http://blogs.technet.com/b/win7/archive/2011/11/08/windows-update-error-80072f8f.aspx
Were you able to run that MS Fixit for the Firewall after syncing your clock ?This is how to add exceptions to Windows Firewall in Vista http://www.howtogeek.com/howto/uncategorized/how-to-create-exceptions-in-windows-vista-firewall/What were you doing to get that new error code as described in your last link ?Did you check IE for the Proxy box being checked ?