How to Install Microsoft Security Essentials

By Steven S. Warren

Microsoft Security Essentials is a free anti-virus offering from Microsoft. It provides protection for your computer against viruses, malware, spyware, and any other type of malicious software that can render your computer useless. The installation is available as a download from the Internet and is tailored for a beginner to install.

Step 1

Open your favorite web browser.

Step 2

Type the following web address: "" and click "Download now." Microsoft Security Essentials supports Windows XP (32-bit), Windows Vista/Windows 7 (32-bit), and Windows Vista/Windows 7 (64-bit).

Step 3

Double-click the downloaded file. User Account Control (UAC) will prompt you if you are installing on Windows Vista or Windows 7. Click "Yes" to allow the program to make changes.

Step 4

Click "Next" on the Welcome screen.

Step 5

Accept the End User License Agreement (EULA).

Step 6

Click "Validate" to make sure your copy of Windows is a genuine copy.

Step 7

Click "Install." After the install completes, Microsoft Security Essentials automatically updates your virus and spyware definitions to the latest release and performs a scan to make sure your computer is virus free.

Tips & Warnings

  • Your computer must be running a genuine copy of Windows to install Microsoft Security Essentials. For more information on running genuine Microsoft software, see

References & Resources