Demonslayer7

Is there away to speed up the app installation of the update when you first download the vendetta client? I'm new to vendatta and trying to try out Scarlet blade my friend told me about and it's taking forever and I have fiber internet. Also when I first loaded the launcher it also wanted me to approve to allow to open and use the the application and it said unknown publisher are you sure you want to continue, yes or no so is this vendetta client app safe?