Browse to the folder where you saved the file, and then double-click Mpam-fe.exe to install the latest definition file. If your computer is running any other Windows operating system, you must be logged on as an administrator to install the latest definition file.When you are prompted for an administrator password or confirmation, type the password or provide confirmation, and then wait while the definition files are installed. Right-click Mpam-fe.exe, click Run as administrator and then click Yes. If your computer is running Windows Vista or Windows 7, click Start, click Documents, and then locate the folder where you saved the definition file.To install the saved definition update file: If you click Save, remember the name of the folder where you saved the file. Microsoft Security Essentials Definition Updates downloads and installs the latest Microsoft Security Essentials for Windows definition updates.Īfter you download the latest definition updates, click Run to install the definition file immediately or click Save to save it to your computer.