...Repair or Reinstall Bitdefender: If configuration corruption is suspected, a repair installation or even a full uninstall/reinstall can clear up residual issues....
...If this is not the case, you can perform a clean reinstall to rule out a faulty installation:
Uninstall the current product with the uninstall tool
Reinstall from Central
Check if issue persists
Let me
...To ensure these different security solutions will not cause difficulties, you will be advised to uninstall them. So, Bitdefender actually replaces Windows Defender in this scenario....