Article ID: 918355 - View products that this article applies to.
While you are using Windows Defender, you receive a message that refers to definition updates in one of the two following circumstances:
The instructions in this article are intended for beginning computer users or those with more computer experience.
If you are a home user who is experiencing this problem on your personal computer, you can receive no-charge support by phone, chat, or e-mail
(http://www.microsoft.com/security/default.aspx). If you are experiencing this problem on a network computer at work, read the "Information for users on an enterprise network" section.
Method 1: Check for updates in Windows Defender
To check for updates in Windows Defender, follow these steps:
Microsoft delivers Windows Defender updates through Windows Update, through Automatic Updates, and through Windows Server Update Service (WSUS). In some cases, you might receive error messages because of problems with these services instead of with problems with Windows Defender. To try to determine the source of the problem, first try to manually install the update definitions. If you can manually install the update definitions, the problem is most likely caused by a Windows Update problem.
Step 1: Restart your computer if necessary
Switch back to Windows Defender and note the error code on the Home page. If the error message that you received in Windows Defender contains code 0x80240016, restart your computer. If the error message that you received in Windows Defender does not contain 0x80240016, go to Step 2.
Step 2: Manually install the update definitions
To manually install the update definitions, follow these steps:
To verify that you have all the required Windows Update files, follow these steps:
Verify that no Windows Update, Automatic Updates, or Windows Server Update Service (WSUS) problems are occurring
Microsoft delivers Windows Defender updates through Windows Update, through Automatic Updates, and through Windows Server Update Service (WSUS). In some cases, you might receive error messages that are caused by problems with one of these services. In this case, these error messages are not related to Windows Defender itself. To troubleshoot a potential Windows Update problem, follow these steps.
Windows Vista, Windows Server 2008, Windows 7
The exact error messages that might occur are listed here. Select the case that best describes your situation to continue to the correct method to use.
Case 1: You receive the following error message when you try to start Windows Defender:
If this describes your situation, try Method 1.
Check for new definitions.
Definitions allow Windows Defender to detect the latest harmful or unwanted software and prevent it from running on your computer.
Case 2: You receive one of the following error messages when you try to check for updates, to download updates, or to install updates from the Windows Update Web site:
The program can’t check for definition updates
Error found: Code error_code
The program can’t download definition updates
Error found: Code error_code
Note The error_code that is included in these messages represents the error code that you receive, and this error code might vary. The most common error codes are 0x8024402f or 0x80240016. However, you might receive a different error code, such as one of the following:
The program can’t install definition updates
Error found: Code error_code
Windows Defender has an option to automatically check for new definitions. To turn on the option to automatically check for new definitions, follow these steps:
Fix it for me
To fix this problem automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.
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Note This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.
Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.
Let me fix it myself
To turn on Automatic Updates yourself, follow these steps based on your operating system:
Windows XP and Windows Server 2003
For more information about how to troubleshoot these problems, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/836941/ )You may encounter temporary connection-related errors when you use Windows Update or Microsoft Update to install updates
(https://support.microsoft.com/kb/924123/ )Error message when you update Windows Defender definitions in Windows 2000: "0x80240022 - the wrong diskette is in the drive."
(https://support.microsoft.com/kb/919448/ )You receive an error message when you try to update the Windows Defender definition set on a computer that is running Software Update Services (SUS) 1.0: “error 0x8024002b”
(https://support.microsoft.com/kb/816731/ )Error message: "0x80070005 Access is denied. You do not have permission to perform the requested operation"
(https://support.microsoft.com/kb/900936/ )You may receive a "0x8024402C" error message when you scan for updates on the Windows Update Web site
(https://support.microsoft.com/kb/818018/ )How to troubleshoot problems connecting to Windows Update or to Microsoft Update
906602To see frequently asked questions about Windows Defender, visit the following Microsoft Web site:
(https://support.microsoft.com/kb/906602/ )How to troubleshoot common Windows Update, Microsoft Update, and Windows Server Update Services installation issues
http://www.microsoft.com/windows/products/winfamily/defender/support.mspxTo see frequently asked questions about Windows Update, visit the following Microsoft Web site:
http://update.microsoft.com/windowsupdate/v6/about.aspxInformation for users on an enterprise network
You can use the step-by-step methods in this article to troubleshoot this problem on your work computer. However, if you are in a corporate environment, the network administrator might have configured the network in a manner that prevents you from downloading the definitions. Additionally, a network administrator might have deployed Microsoft Software Update Services server on the network. For example, the network might be using Software Update Service (SUS) 1.0. Windows Defender cannot receive updates from SUS 1.0. If this is the case, the network administrator must deploy Windows Server Update Services (WSUS). Definitions for Windows Defender must be offered from the WSUS server. Therefore, before you try the methods in this article at work, it is a good idea to contact the network administrator first to see whether trying to resolve this problem yourself is even possible.
Article ID: 918355 - Last Review: April 23, 2015 - Revision: 15.3