Your version of the Windows operating system is not supported by this program. Error code 0x. 80. FF0. 4. To get around this error message, right click the mseinstall. From the properties window, select the compatibility tab. Within the compatibility tab tick Run this program in compatibility mode for under Compatibility Mode and select Windows 7 from the drop down box, as shown. Click OK to continue. If you were to run the mseinstall. Microsoft Security Essentials cannot be installed on your operating system. Windows Program Compatibility mode is not supported by this program. Error code 0x. 80. FF7. 1. In order to resolve this, run command prompt as administrator and enter the folder where the mseinstall. Run the mseinstall. The installation wizard should now correctly open and Microsoft Security Essentials can now be installed and will proceed without the previous error messages, click Next to continue and work through the installation wizard. Once the installation has completed you can optionally update and perform a scan, this is recommended as the definitions database needs to be kept up to date to find newer threats. An Internet connection will be required to download any available definition updates through the application, however these can also come through from Windows updates so if you have a WSUS server you can update from here as well. After updating a quick scan will take place. You can select the Settings tab to modify when the weekly automatic scheduled scan takes place, by default a quick scan is set to run every Sunday at 2am and will not use more than 5. CPU resources. Testing. Now that Microsoft Security Essentials has been successfully installed, we will test the actual functionality of the program to ensure that it will correctly identify a threat. To do this we will create a test EICARs file and see if the real time protection automatically detects and quarantines it. Essentially we are just going to open Notepad and create a. Comparison Of Shopping Cart Software Wikipedia En. Shortly after saving the file we have been visually alerted that malware has been detected and that Microsoft Security Client is taking action to clean the detected malware. If we check the History tab of Microsoft Security Essentials we can then see the test file listed as a quarantined item, confirming that it is working correctly as intended in Windows Server 2. R2. Summary. Although not officially supported, we have successfully installed Microsoft Security Essentials a cut down Windows Defender in Windows Server 2. 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. System Center Endpoint Protection SCEP or some other option available from some security vendor.