Windows Update Error Code 0x80072efe most commonly occurs when you are trying to upgrade your Windows to the latest version. The occurrence of this error code 0x80072efe is directly related to connectivity issues on your Windows machine that runs the update assistant successfully. If you receive an error code 0x80072efe when you download updates from Windows Update or Microsoft Update, you might need to restart the Background Intelligent Transfer Service (BITS) or the Windows Event Log service.