Application failed to initialize:0x800106ba. A problem caused windows defender service to stop. To start the service, restart your comupter or search help and support on how to start a service manually.
I have restarted my computer several times and it reappears, I have also searched help and support and can find nothing about windows defender. It does not stop me gaining access to the internet or any other program. But I would like to know how I remove this warning and what is Windows Defender?