Bitdefender Total Security 2015Can you better elaborate your question please so that someone can try to help you?
What BD version?
What is your OS?
AVC not working after update. How to fix this?
Yes, it was a module update, because Bitdefender needs restart, and after restart AVC was disabled and not working when i turning it onTake it direct to Bitdefender. It could be a bug introduced with the recent update - if it was a module update. A signature database update is unlikely to cause such an issue.