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Windows Defender is included in Windows 10/11 system and is not available for a standalone download now. It will work automatically in the background just like MS Security Essentials did in Windows 7.Read More Windows Defender Download for Windows 10/11 If for some reason Defender won’t run, just reboot.įrom this point on, you can pretty much forget that Windows Defender is there. You can close the Defender window now and just let it work in the background. Just click Start, type defender, and click on the Windows Defender item to launch it.Ĭlick the Update definitions button. The last step is to make sure Windows Defender is updated. Just click the Uninstall button, and you’re almost done! That will launch the MS Security Essentials Uninstaller, like so: If a generic box pops up with a question about uninstalling, just click OK. “C:\Program Files\Microsoft Security Client\setup.exe” /x /disableoslimit Paste the following line into the Command Prompt window, and press Enter: Next, right-click the Start button, and choose Command Prompt (Admin). Go ahead and close File Explorer, since you won’t need it any more. You’ll see this guy:Ĭlick the Change settings for all users box.Ĭhange the Compatibility mode settings as shown (use compatibility mode for Windows 7), and then click OK. Right-click the file Setup.exe, and choose Properties. Navigate to: C:\Program Files\Microsoft Security Client

If you try to uninstall the program, you get this:

You can tell you still have Microsoft Security Essentials running if you see the green icon in your task bar in Windows 10: This is because Windows Defender is basically the same thing.īut, that’s not what happens. Defender won’t run, and neither will Security Essentials.Īccording to Microsoft, when you upgrade to Windows 10, MS Security Essentials should be uninstalled automagically. Worse yet, Windows 10 is very confused, since Windows Defender is basically the same program. There’s only one problem: Every time you reboot, you get an error message about Microsoft Security Essentials.