
Browse to the folder where you saved the file, and then double-click nis_full.exe to install the latest definition file.Ĭonsider using Malwarebytes for complete antivirus protection and to protect your devices, data, and privacy.Microsoft Security Essentials (MSE) (previously codenamed Morro) is a free antivirus software created by Microsoft that provides protection against viruses, spyware, rootkits, and trojans for Windows XP, Vista, and 7.


Note: If you do not have an administrator account on the computer, ask an administrator to log on and install the definitions file for you. Browse to the folder where you saved the file, and then double-click Mpam-fe.exe to install the latest definition file.

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.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.
