W550s Windows Defender cannot be activated

W550 came with preinstalled McAfee. I removed the software in windows and then used the McAfee tool to completely uninstall. My system will not turn on Windows Defender. Help!

No other AV has been loaded, but I understand it. I assumed that Security Center would be refreshed after all of these changes and reboots, but obviously was not. I went and manually restarted Security Center, solved the problem as soon as he was running again.

http://computerstepbystep.com/security_center_service.html

Tags: ThinkPad Notebooks

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