When I try to update, I get Error 0x80072efd. What??
Are you referring to Windows updates? If so, it generally means there’s an issue with connectivity.
If it’s a firewall issue, you need to make sure svchost can connect over TCP to ports 80 and 443. The defalut firewall rules allow this. If you’re unsure, post a screen shot of your firewall application rules and the firewall logs.