Error "installation Failed" Two Or Three Times A Day [Osx El Capitan]

MilesTEG

Hello,

Since some days, maybe since the beginning (aka since the installation a few days ago, look at the screenshots), I've got an error saying "L'installation a échoué / Veuillez retenter l'installation à partir de Central"
In english, it may be this : "Installation failed / Please retry the installation from Central"

Here the message in the notification bar :

Just before having this notification, I've got a little windows with a progress bar from Bitdefender (I don't have time to capture it), saying that bitdefender is downloading (an update if I remember correctly). After the download is complete, it try to install, but failed and I get the error's message.

The date of installation :

I went to the console to grab the log, so here it is :

With the search term Bitdefender :

With the search term Antivirus :

I'm running OS X El Capitan 10.10.4 15E56a

(Ok, it's a beta, but it's running great on my two mac, and only this one get's this message...)

Can somebody help me figure out what's going on ? And how to get id of this annoying error message ?

Thanks very much

PS : I'm sorry for my poor english... I do the best I can

[Deleted User]

Thread locked.