I checked the log for the Swarm Agent and this is what I get:
9:53:35 PM: Starting up SwarmAgent ...
9:53:35 PM: ... registering SwarmAgent with remoting service
9:53:35 PM: ... registering SwarmAgent network channels
9:53:35 PM: ... initializing SwarmAgent
9:53:35 PM: ......... certificate check has failed
9:53:35 PM: ...... initializing cache
9:53:35 PM: ......... using cache folder 'C:/ProgramFiles/EpicGames/UnrealTournamentEditor/Engine/Saved/Swarm\SwarmCache'
9:53:35 PM: ......... recreating SwarmAgent cache staging area
9:53:35 PM: ...... initializing connection to SwarmCoordinator
9:53:35 PM: ......... using SwarmCoordinator on RENDER-01
9:53:37 PM: ......... SwarmCoordinator failed to be initialized
9:53:37 PM: ...... initializing local performance monitoring subsystem
9:53:38 PM: ... initialization successful, SwarmAgent now run
I've tried closing EVGA's PrecisionX software, but that fixes an unrelated problem with framerate and UI lag. I tried closing NZXT's CAM software hoping it would magically fix my issue like the PrecisionX fix did-nope. Creating a LightmassImportance volume doesn't change anything. Tried changing the Verbosity setting from "Informative" to "Verbose" and didn't fix my issue.
So I was just making my level, didn't have a lot in it. Nothing complicated, just started building a level. Place some BSP objects here and there, a couple lights with default settings, a trigger volume, then I build lighting only aaaaaaaand the entire editor freezes at the "Cleaning up" text with the orange bar all the way to 100%. I also tried opening a new level, completely blank and just put a Cube into the level, build lighting and froze at the same point.
My rig's specs:
Dec 07 '16 at 07:49 AM