Microsoft Security Essentials plays an integral role in keeping your computer safe and secure, which is why you would naturally want to keep the program completely up to date. However, when trying to update Microsoft Security Essentials either through the program itself or by checking for updates in Windows Update, some Windows users receive error 0x80072efd. In addition to Microsoft Security Essentials, error 0x80072efd is also known to appear when trying to update Windows Defender.
Error 0x80072efd basically inhibits a person from updating Microsoft Security Essentials to latest version. The culprit behind error 0x80072efd when trying to update Microsoft Security Essentials is mostly one of four things – an application or process interfering with your internet connection, resource issues on your computer, high internet activity or recoverable data base errors. Regardless of what might be causing error 0x80072efd, the following are the two most effective methods that you can use to fix it:
Method 1: Fix the issue using an elevated Command Prompt
Open the Start Menu.
Type cmd into the Search
Right-click on Command Prompt or cmd and click on Run as administrator.
If you are prompted for confirmation of the action or an administrator password, go through with the prompt.
Type netsh winhttp reset proxy into the Command Prompt and press the Enter key
Now try to update Microsoft Security Essentials, and it will be updated successfully.
Method 2: Uninstall any and all third-party antivirus programs
In some cases, third-party antivirus programs, especially McAfee Security, can interfere with either your internet connection or Windows Update altogether, causing all of your attempts to update Microsoft Security Essentials to fail. If that is the case, simply navigating to Control Panel > Uninstall a program and uninstalling/removing all of the third-party antivirus programs that you have on your computer.
Once you have uninstalled all third-party antivirus programs, restart your computer. As soon as your computer boots up, you should be able to update Microsoft Security Essentials successfully. Not having an antivirus program on your computer can leave it vulnerable, so as soon as you manage to successfully update Microsoft Security Essentials, download and install a third-party antivirus program other than the one(s) you were previous using.