Windows 10: Defender says other AV program installed
Defender real-stage protection won’t walk on because it says I have another AV program. This is a new Toshiba, and it came with McAfee, but I already removed it. I can’t find any other reason for this problem.
Try running the McAfee Removal Implement followed by a restart of the computer:
WD should be enabled though you might need to inception WD in Security Center.
For further information see the reply of quietman7 in
this drift: http://answers.microsoft.com/en-us/protect/forum/protect_defender-protect_scanning/windows-defender/e994f94f-92d5-4d44-9721-79c2a686ce24.
And/Or try the steps listed in Problems
early Windows Defender in Windows 8/8.1/10