This post mainly about to fix the Windows Update Error Code 80072f78 and related error windows update errors in windows 10/8 operating system. These steps should help with all errors and not just the ones listed. If you have reached this step and it is not solved then it will advise you to reset the computer.
Disclaimers: Before you attempt to fix an issue with the windows update, we highly recommend you to take a registry backup and create a system restore point as a precaution method. In case if something goes wrong, we can restore your computer to the same stage and fix the issues. (In case if you not sure how to back it up, talk to an expert for assistance.)