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Windows 7 Definition update issues for Windows Defender

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Three things to remember when you are working with computers.
• First thing is "YOU CAN DO IT".
• Second take your time, a little mistake can cause a big problem.
• Third all answers are only a question away.

TABLE OF CONTENTS is after these links.
Here are some links for online virus program and also free spyware programs.
If you are experiencing computer Problems such as slowness, strange icons appearing, tool bars appearing, home page changing, please use one of the following links to check for a virus or trojan.


• Panda Virus Free Online Virus Scan
  
• AVG Anti-virus Program (FREE)
  • AVG is a great "FREE" program and I used to keep a link to the download but they keep changing it all the time and I can't keep this link up to date so Google "Download AVG Free" to get the download link. SORRY!

Definition update issues for Windows Defender Symptoms
• While you are using Windows Defender, you receive a message that refers to definition updates in one of the two following circumstances:
  • When you open Windows Defender, you receive a message that states that you should check for new definitions.
    If this describes your situation, try Method 1.
  • When you try to check for updates in Windows Defender, you receive an error message that states that definition updates cannot be checked, downloaded, or installed.
    If this describes your situation, try Method 2.
• Detailed Symptoms
  • 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:
      • Check for new definitions.
        • Definitions allow Windows Defender to detect the latest harmful or unwanted software and prevent it from running on your computer.
        • If this describes your situation, try Method 1.
    • 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
        or
        The program can't download definition updates
        Error found: Code error_code
        or
        The program can't install 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:
        • 0x8024402c
        • 0x80240022
        • 0X80004002
        • 0x80070422
        • 0x80072efd
        • 0x80070005
        • 0x80072f78
        • 0x80072ee2
        • 0x8007001B
      • If this describes your situation, try Method 2.
• Solution
  • Method 1: Check for updates in Windows Defender
    1. Start Windows Defender if it is not already open. Click Start, click Programs, then click Windows Defender.
    2. Check for new definitions. Click Check for Updates Now.
  • Method 2: Manually install update definitions and verify Windows Update files
    • 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
        1. Visit the Security Portal at one of the following Microsoft Web sites:
           • If you are using the English version of Windows, visit the Security Portal at the following Microsoft Web site:
             http://www.microsoft.com/security/portal/ADL.aspx
           • For more information about the Security Portal for non-English versions of Windows, click the following article number to view the article in the Microsoft Knowledge Base:
             923159 How to manually download the latest definition updates for Windows Defender
           • Follow the steps on the Web site to download and install the appropriate definition updates.
           • If you cannot install the definition updates manually or if you still receive error messages about definition updates in Windows Defender, some other things are occurring that are beyond the scope of this article. If this is the case, you might want to ask someone you know for help, or you might want to contact support.
             
             For more information about how to contact your local Microsoft subsidiary, visit the following Microsoft Web site.
             http://support.microsoft.com/contactUS/
        2. If you were able to manually install the update definitions, the problem is most likely caused by a Windows Update problem. Therefore, you should continue with Step 3.
      • Step 3: Verify that you have all the required Windows Update files
        1. Open the Windows Update Web site. Visit the following Microsoft Web site:
           http://www.windowsupdate.com
        2. Install all the updates that are recommended. If you have problems with Windows Update, some other things are occurring that will require advanced troubleshooting.
  • Method 3: Advanced troubleshooting
    • 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
          1. Examine the Windowsupdate.log file for error messages, To view the log file, follow these steps:
             1. Click Start, type %windir%\windowsupdate.log in the Start Search box, and then press Enter.
             2. For more information about how to read the Windowsupdate.log file, click the following article number to view the article in the Microsoft Knowledge Base:
                902093 How to read the Windowsupdate.log file
          2. Visit the following Microsoft Web site:
             http://windowshelp.microsoft.com/windows/en-us/search.aspx?=&qu=%22windows+update+error%22
          3. On the "Windows Help and How-to" Web page, enter the keywords that describe the problem.
• Prevention Tips
  • Windows Defender has an option to automatically check for new definitions:
    1. Start Windows Defender.
    2. Click Tools, then click Options.
    3. Under Automatic scanning, click to select the Automatically scan my computer check box.
    4. Click to select the Check for updated definitions before scanning check box, then click Save. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
  • Windows Defender works with the Windows Automatic Updates feature to automatically install the latest definitions.

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