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An unauthorized change was made to Windows RRS feed

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    An unauthorized change was made to Windows:

    You will no longer recieve notifications, including those about your license or activation. Use the link below to find out how to fix your system.

    Error: 0xC004D401
    Description: The security processor reported a system file mismatch error.


    I got this message today after returning to my Dell M1530 from playing on the Wii. I'm on Windows Vista Home Premium 32bit. I've never had this problem before, so this is very odd to me. I got another message telling me I may be a victim of software piracy, and windows Genuine validation keeps failing. I've researched this error to no avail.

    Thanks in advance for your help
    Ethan R.
    Monday, November 24, 2008 2:24 AM

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    Ethteck,

    Please provide us with the results of the MGA Diagnostic Tool as soon as you can. This will allow us to analyze what you are currently experiencing so we may be able to provide you with a solution.


    Thank you :-)

    Stephen Holm, MS
    WGA Forum Manager
    Stephen Holm
    • Marked as answer by Stephen Holm Tuesday, December 2, 2008 1:13 AM
    Tuesday, November 25, 2008 5:45 PM

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    Hello Ethteck,


    Thank you for visiting the Genuine Advantage forum and providing us with the Error Code.  We really need to see the results for your MGA Diagnostic.  The Genuine Advantage forum is here to help protect you, our valued customer. It is important for people like you to report a piracy case who have become a victim to assist in stopping unscrupulous business practices. 

    Please follow the steps below as it could resolve your issue. If need be, provide us with additional information to determine the cause of this issue.

    Make sure you are logged on as an Administrator.

    Confirm you are using the most current version of Genuine Advantage by clicking Validate Windows on the website below:

    http://www.microsoft.com/genuine

    If the above steps do not resolve your issue, continue below.

    Please run the Microsoft Genuine Advantage Diagnostic Test (MGADT) so that I may analyze the results.

    By clicking the link below, you will download the MGADT.  Then click the Run button. Then click the Run button again. Then click the Continue button to perform the diagnostic. The Windows tab should show, click the Copy button to paste your report to the clipboard.  Then paste the report into a New Post on this Forum by adding a post in it and pressing Ctrl V (to paste the text). Clicking the OK button will clear the Diagnostic window. Here is the download link:

     http://go.microsoft.com/fwlink/?linkid=52012

    Please tell us about the Certificate of Authenticity (COA) for your copy of Windows Vista.

    1. What edition/version of Windows XP is titled?

    ·         Home Basic

    ·         Home Premium 

    ·         Business

    ·         Ultimate

    2. Does it read "OEM Software" or "OEM Product" in black lettering?

    3. Or, does it have the computer manufacturer's name in black lettering?

    4. Please provide the customer scenario you are experiencing.

    5. DO NOT post the Product Key. 

    Not sure what to look for, see this page to reference your COA:

    http://www.microsoft.com/resources/howtotell/product.aspx?pID=b5c507e5-3522-40de-a2f4-97d82b39cc47&cID=ea710cad-37b0-4975-bcd6-abfee19961df&method=oem&displaylang=en

    NOTE: The data collected with the MGADT does NOT contain any information that can personally identify you. The information can be fully reviewed, by you, before being posted.

    Thank you for your participation here on the Genuine Advantage forum. We look forward to working with you.



    Thank you,


    Stephen Holm, MS
    WGA Forum Manager

    Stephen Holm
    Monday, November 24, 2008 6:44 PM
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    It just means a critical system file has been modded. Usually one for activation/validation. A repiar install or sometimes, if required, a clean install will fix it (if you do a clean install, make sure to backup.) Try doing a virus / spyware scan.
    • Proposed as answer by motherboardlove Tuesday, November 25, 2008 12:36 AM
    • Unproposed as answer by Stephen Holm Tuesday, November 25, 2008 5:37 PM
    Tuesday, November 25, 2008 12:36 AM
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    Motherboardlove,

    Yes a file has been modded. We need the customer to FIRST provide the results for the MGA Diagnostic so we may analyze what they are currently experiencing. The goal is to provide a resolution vs. a repair install or clean installation.  Repair installation and clean installations are very time consuming so if there are other alternatives we should look for all other possible avenues first. Please lets get the results first prior to providing any resolutions.


    Thank you motherboardlove,

    Stephen Holm, MS
    WGA Forum Manager
    Stephen Holm
    Tuesday, November 25, 2008 5:44 PM
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    Ethteck,

    Please provide us with the results of the MGA Diagnostic Tool as soon as you can. This will allow us to analyze what you are currently experiencing so we may be able to provide you with a solution.


    Thank you :-)

    Stephen Holm, MS
    WGA Forum Manager
    Stephen Holm
    • Marked as answer by Stephen Holm Tuesday, December 2, 2008 1:13 AM
    Tuesday, November 25, 2008 5:45 PM