Hello,
Welcome to Microsoft Community. I will certainly help you with the issue that you are facing.
To fix this issue and to know why it occurs, refer.
**Windows Update error 80072efd**
If the issue persists, follow the methods below:
Method 1: Run the Windows Update Troubleshooter
Try to run the Windows update troubleshooter, it will detect and resolve the most common issues with the Windows updates. To do so, follow the link below. You may also follow some other common solutions on the same articles.
http://windows.microsoft.com/en-us/windows/troubleshoot-problems-installing-updates#1TC=windows-7
Method 2: Reset Windows Update components
If the issue is with the Windows update components, this method will resolve the issue by repairing all the components associated with it. Click on the link below and follow the article on the same.
How do I reset Windows Update Components?
To do so: Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
*How to back up and restore the registry in Windows*
Method 3: Clean Boot
A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows. To know more, follow the article below:
http://support.microsoft.com/kb/929135
Note: After troubleshooting, refer to this section ‘How to reset the computer to start normally after clean boot troubleshooting’.
Hope the information helps. Let us know if you need further assistance with Windows related issues, we’ll be glad to assist you.
Thank you