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Security Essentials can only be installed on Windows Vista and Windows 7, as on more recent Windows iterations it is superseded by Windows Defender.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.
The Microsoft Security Essentials Definition Updates deploys a package containing the latest virus signatures for the latest release of Microsoft Security Essentials.
Keeping Microsoft Security Essentials up-to-date ensures that your computer is protected at all times and that the latest viruses and spyware variations will be detected during scanning.
One important thing is to download the correct definitions for your system’s architecture: 32-bit or 64-bit.Although not officially supported, we have successfully installed Microsoft Security Essentials (a cut down Windows Defender) in Windows Server 2012 R2 and confirmed that it is working correctly and detecting security threats.This is better than the default level of security, which is none as Windows Defender is only built into Windows 8, 8.1 and 10 client operating systems, however it is recommended that server operating systems make use of enterprise solutions such as System Center Endpoint Protection (SCEP) or some other option available from some security vendor.By default if you try to install Microsoft Security Essentials in Windows Server you will receive various errors which we will cover how to fix here.While it is not possible to directly download Windows Defender to install, we can instead make use of Microsoft Security Essentials which is available as a slightly cut down version for older versions of Windows, such as Windows 7, in order to help protect against viruses, spyware and other malicious software.Microsoft Security Essentials provides most of the protection methods that Windows Defender does with the exception of rootkit and bootkit protections.It is important to note that Microsoft Security Essentials is designed to provide a basic level of free protection for home or small business PCs rather than important server infrastructure.Windows Defender has been built into Windows 8, 8.1 and 10 by default to provide protection against malware, however there is no such default program installed in the Windows server operating system.To provide a basic level of security in a small server environment, we can install Microsoft Security Essentials with some simple modifications which contains most of the functionality of Windows Defender for free.Module 1 is a multimedia instructional program utilizing adult learning principles to assist case managers in understanding the theory behind case management; in gaining knowledge of principles and tools utilized in case management; and in applying best practices across various case management settings.Module 2 includes case-based content intended to assist the learner in practical understanding of how to perform the role and function of case management given specific disease states, scenarios, and conditions common in case management.