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The new version of Microsoft Security Essentials for Windows 8/8.1 (x64 and x86) was released! It is compatible with Windows Vista, Windows 7 and unofficially Windows 8/8.1. The following tutorial shows you how to install it on Windows 8/8.1!

This is not an official updater! The MSE files have not been modified!
It supports Windows 8 RTM and 8.1 RTM, but may work with older versions too.
The author is not responsible for any damages this mod may cause to your system.

Microsoft Security Essentials for Vista / 7 = Windows Defender in Windows 8.1
Please DO NOT install MSE on Windows 8.1 because it is THE SAME program!
If you want, you can install it on Windows 8.1 – I REALLY DON’T CARE!

INSTALLATION / UPGRADE GUIDE (for Windows 8/8.1 only!)

Step 1 –  If Microsoft Security Essentials is installed in your Windows 8 system,
uninstall it by using my uninstaller (Steps 2-3) otherwise go to Step 5.

Step 2 – Open the “Control Panel” and navigate to “Programs and Features”.
Please check the version of MSE and use the correct Uninstaller program.

MSE Uninstaller for version 4.1.522.0 (x64)Download/Dropbox/OneDrive
MSE Uninstaller for version 4.1.522.0 (x86)Download/Dropbox/OneDrive
MSE Uninstaller for version (x64)Download/Dropbox/OneDrive
MSE Uninstaller for version (x86): It was not released!
MSE Uninstaller for version (x64)Download/Dropbox/OneDrive
MSE Uninstaller for version (x86)Download/Dropbox/OneDrive
MSE Uninstaller for version (x64)Download/Dropbox/OneDrive
MSE Uninstaller for version (x86)Download/Dropbox/OneDrive
MSE Uninstaller for version 4.4.304.0 (x64): Download/Dropbox/OneDrive
MSE Uninstaller for version 4.4.304.0 (x86): Download/Dropbox/OneDrive
MSE Uninstaller for version (x64)Download/Dropbox/OneDrive
MSE Uninstaller for version (x86)Download/Dropbox/OneDrive

Step 3 – You must log off and log in or restart your Windows to continue!

Step 4 – Download/unpack and double click on a “MSE_uninstall.reg” file.
MSE Uninstall (Registry Key): Download/Dropbox/OneDrive

Step 5 – Download the official MSE Beta Installer (x64 or x86):
Official MSE 4.0.1111.0 Beta (x64): Download/Dropbox/OneDrive
Official MSE 4.0.1111.0 Beta (x86): Download/Dropbox/OneDrive

Step 6 – Install MSE 4.0.1111.0 Beta (x64 or x86). Don’t forget to run this
program as an Administrator in compatibility mode for Windows 7!

Step 7 – Download and install the unofficial MSE Installer,
run this program as an Administrator.
MSE for Windows 8 (x64): Download/Dropbox/OneDrive
MSE for Windows 8 (x86): Download/Dropbox/OneDrive

Step 8 – You must log off and log in or restart your Windows to continue!

Step 9 – To prevent false detection of MSE in Windows Update List,
please download/unpack and double click on a “mse_4.4.304.0_register.reg” file.
MSE Register v4.5 (Registry Key): Download/Dropbox/OneDrive

Step 10 – Open Microsoft Security Essentials and update the virus definitions.
A further update (virus definitions) will be provided automatically by
Windows Update.

UNINSTALLATION GUIDE (for Windows 8 only!)

Microsoft Security Essentials (FE Mod) can’t be uninstalled in ordinary way, please download and run the unofficial uninstaller from First Ever.

Step 1 –  Follow the Steps 2-4 from the Installation/Upgrade Guide!

Step 2 – Open: “Control Panel” -> “Programs” -> “Programs and Features”

Step 3 – Uninstall “Microsoft Security Essentials”. After uninstalling MSE
you can use Windows Defenter.



Microsoft Security Essentials Modern Icon: Download/Dropbox/OneDrive

Microsoft Security Essentials Modern Icon

Please register on my website and if you have any questions, feel free to leave a comment!

Author: Marcin Grygiel aka Marcin-prv

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