Most of the times, when Security Center reports Bitdefender Antivirus and/or Firewall are turned off, it is just a display issue. In other words, while Bitdefender is working properly protecting your PC the status displayed in Action Center is showing otherwise not being able to check the real status.
yes after a reboot still windows security tells me that the service is not enabled so I followed this video
I didn't restart yet, if this is not correct then I will just go change it back. Anyone sees something wrong ?