Microsoft Security Essentials (MSE) provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. Microsoft Security Essentials updates its virus definitions using Windows Automatic Update. We can also use its built-in command “MpCmdRun” to download and install virus definition updates without Automatic Update.
Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure – when you’re green, you’re good. It’s that simple.
Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want – without interruptions or long computer wait times.
How to download and install a Microsoft Security Essentials updates:
- Check whether your version of Windows is 32-bit or 64-bit.
- In the table left, click on the link that will work for your version of Windows.
- Save the file to your Desktop.
- When the file has finished downloading, go to your Desktop and double-click the file (it will be called mpam-feX86.exe, or mpam-feX64.exe).
- Follow the prompts to install the update.
One important thing is to download the correct definitions for your system’s architecture: 32-bit or 64-bit. Once you grab the setup file you need, just double click on it and follow the on-screen instructions to apply the latest definitions to Microsoft Security Essentials.
The installer contains the complete, up-to-date anti-malware definitions for Microsoft Security Essentials, deploying the scanning engine (mpengine.dll), along with other files, such as mpasbase.vdm, mpasdlta.vdm, mpavbase.vdm, mpavdlt.vdm, mpsigstub.exe.
Please note that Microsoft Security Essentials can only be installed on Windows Vista and Windows 7, as on more recent Windows iterations it is superseded by Windows Defender. Therefore, you should point to the Windows Defender Definition Updates if you are running Windows 8 or higher.
Additionally, Microsoft Forefront Client Security ended its life cycle on July 14th, 2015. Therefore, no definition updates will be available in the future for Forefront Client Security.
Microsoft security essentials updates (32-bit)
Microsoft security essentials updates (64-bit)