Windows Update error code 0x80072efd (Win 10, 8.1 & 7)
Windows update error code 0x80072efd is an error that usually prevents you from downloading and installing Windows updates. It indicates that there is a problem gaining a connection and the inability to communicate with Windows servers. It may also be a Windows Store-related error. The error may appear in Windows 10, 8.1, 8, and 7.
Other possible reasons for the error include a firewall or local network, proxy server, or anti-virus may be interfering with your connection to the Windows Update site; Windows Update may be mapped to a specific IP address in the HOSTS file on your computer, or the MTU setting on your router is either too high or low.