I'm unable to turn on Windows Defender real-time protection. It says "Handled by another AV program". But I have no AV program installed. Earlier I had bit-defender AV but I uninstalled it (Even I used bit-defender uninstaller tool). Still it shows the error. Please suggest me a solution. Is there any kind of tool which detects the AV or removes any left over AV files?
I'm currently on Windows 10 (version 1607) build 14372
Attaching the screenshot of windows defender.