Installing Microsoft Security Essentials on Windows 7


To install Microsoft Security Essentials on Windows 7, follow these steps.


Identify If You Have a 32-bit or 64-bit Version

  1. Open the System Properties by selecting the Start button, right-clicking Computer, and then selecting Properties.

    Start computer properties MSE

  2. Under the System heading, you can view the system type.

    Control panel system operating type MSE

Install Security Essentials

Once you have determined which operating systems version you have installed, download and install the corresponding version of Microsoft Security Essentials.

  1. Download Microsoft Security Essentials from the Microsoft site.
    • If your computer is running a 64-bit operating system, download the ENUS\amd64\MSEInstall.exe option.
    • If your computer is running a 32-bit operating system, download the ENUS\x86\MSEInstall.exe option.
  2. Once the download finishes, double-click the file to run the installer. You may get a pop-up box asking you to "allow the following program to make changes to this computer." Select Yes.

    MSE installation Wizard: Do you want to allow changes?

  3. Once the installer extracts and runs, select Next.

    Welcome to MSE Installation Wizard

  4. Read through the Software License Terms, and select I Accept.
  5. Select Join the Customer Experience Improvement Program and then Next.
  6. Check the box for If no firewall is turned on, turn on Windows Firewall and select Next.
  7. Confirm that you don't have any other anti-virus programs installed, then select Install.
  8. When the program successfully installs, you should see the message, You have successfully completed the Security Essentials Installation Wizard.

    Completing the Microsoft Security Essentials Installation Wizard

  9. Select Finish, and allow Microsoft Security Essentials to perform an initial scan of your computer.

    MSE PC Status: Protected

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