I've upgraded from Windows 7 Home version where I used Microsoft Security essentials as my anti virus. Having upgraded Windows defender won't run. I get the notice 'Started then stopped. Some services stop automatically if they are not in use by other services or programs'. I guess there is some switch or other that Defender is checking to see if I have another anti virus running (which I haven't). Can anyone help me solve this problem. Please.
I've just discovered lurking in the background Microsoft security Essentials still running (though I couldn't find this via control panel). So, how do I turn off MS Sec Ess to allow Windows Defender to run ?