If you aren’t currently running Microsoft Security Essentials and would like to install the latest version, please follow the steps below:
- Click here: http://windows.microsoft.com/en-US/windows/products/security-essentials, and then click Free* Download.
- If a File Download notification appears, click Run.
- If a User Account notification appears, click Yes.
- Follow the steps to validate your copy of Windows and install Microsoft Security Essentials.