So yeah i think the total time wasted trying to make this happen is about 5 hours now. When i go to confront kellogg in his room after his synths have been told to "stand down" they still aggro me the moment they see me so i am unable to confront him and complete that portion of the quest. I have tried it with my armor off no weapons and even stark naked. I have tried sneaking up to him and i can even get the first line of dialogue out before they still aggro on me. I even reloaded and completely redid the building. Nothing works. At all. Now i have seen this issue only a handful of times eslewhere while searching for a solution. The most i have gotten out of it is to just kill him and go on even though i would not be able to complete the quest. I am hoping to maybe get some solution from someone else with this issue or even word back from a company member. I would rather not miss this point in a main story quest because of this aggro glitch. also i think its kellogg as well as the synths that aggro. This is pretty game breaking to me as this is a main story quest. Now if someone can patch it to where they properly don't aggro like they should or where the confronting kellogg bit of quest will complete once he's dead i'd be fine with that if it's an easier quicker patch.

I finished this one last night and worked for me. When I went into the room the synth's stopped when Kellogg said to and then the normal conversation played out until I did what I had to do to him. Out of all the posts I've read in the past week its strange that nobody from Bethesda is responding, except to move posts to another location or to delete them due to violation of some rule. Come on admins, help some people out.

I have this problem too, re-done the fort only to suffer the same issue again. I cannot talk to Kellogg, he goes hostile the moment I get into conversation range. To attempt to resolve the issue I have used the tfc console command to kill off the other synths, used a stealthboy to approach but this does not work either. I have tried to use the 'disable' command in console on Kellogg but this is not allowed by the game to be used on this npc. Thirty hours in, and I cannot continue the main quest because of this bug. The closest I have come is sneaking behind Kellogg using stealthboy and actually initiating the first reponse ('Where is Shaun' ("Give me back my son!")) but Kellogg goes hostile in the middle of the conversation and breaks away. To clarify, I am naked, carrying no weapons or armour and am travelling at walking (not running or sprinting) pace. Any chance of a hotfix for the PC? There are no submission requirements needed for that.

Update: Ok to solve this problem I used the following command in the console (without quotes) "completeallquestobjectives MQ106" you will be able to continue as normal afterwards.