There was a previous discussion about this exact issue, but has been closed
Sometimes when I startup my PC, I do not get a Bitdefender icon in the notification area of my task bar. When this happens, I am unable to right click on a file and have Bitdefender run a security scan on the file. I have had to restart my PC for it to sometimes begin working again. The linked thread above talked about Bitdefender running in scheduled tasks. There is nothing in my scheduled tasks showing that Bitdefender is running. Any help on this would be appreciated.