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.
