'BUILT WITH UDK has stopped working'! PLEASE HELP!
Hey guys, can someone help me? I get the error message 'BUILT WITH UDK has stopped working' when i try to play my level on a PC. This even occurs when i start a brand new level with one static mesh actor in it! 
Yesterday my computer run this process fine, this morning its not working at all.
I dont know whats happened (noone has touched my computer overnight either)
Other responses to this question often ask for people to share their Launch.log file for the answer.
I don't understand what this is saying, but hopefully someone else knows.
The only other thing I can think thats happened is that a game I managed to package last night completed and to test it i run the .exe folder to which it start downloading visual studio etc and im worried whatever was in the download maybe clashing with my UDK running.
*The play in editor mode works fine.
Yesterday my computer run this process fine, this morning its not working at all.
I dont know whats happened (noone has touched my computer overnight either)
Other responses to this question often ask for people to share their Launch.log file for the answer.
I don't understand what this is saying, but hopefully someone else knows.
The only other thing I can think thats happened is that a game I managed to package last night completed and to test it i run the .exe folder to which it start downloading visual studio etc and im worried whatever was in the download maybe clashing with my UDK running.
*The play in editor mode works fine.
Log: Log file open, 02/21/14 11:16:41
Init: WinSock: version 1.1 (2.2), MaxSocks=32767, MaxUdp=65467
DevConfig: GConfig::Find has loaded file: ..\..\Engine\Config\ConsoleVariables.ini
Init: Version: 10907
Init: Epic Internal: 0
Init: Compiled (64-bit): Jul 1 2013 15:03:50
Init: Changelist: 1715227
Init: Command line: editor
Init: Base directory: C:\UDK\UDK-01\Binaries\Win64\
[0000.22] Init: Computer: JON-PC
[0000.22] Init: User: Jon
[0000.22] Init: CPU Page size=4096, Processors=4
[0000.22] Init: High frequency timer resolution =2.929775 MHz
[0000.22] Init: Memory total: Physical=32.0GB (32GB approx) Pagefile=64.0GB Virtual=8192.0GB
[0000.22] Log: Steam Client API Disabled!
[0000.25] Init: WinSock: I am Jon-PC (192.168.1.64:0)
[0000.25] Init: Presizing for 0 objects not considered by GC, pre-allocating 0 bytes.
[0000.25] Init: Object subsystem initialized
[0000.28] Log: SystemSettings based on: SystemSettings
[0000.30] Log: Found D3D11 adapter 0: NVIDIA GeForce GTX 780
[0000.30] Log: Adapter has 2994MB of dedicated video memory, 0MB of dedicated system memory, and 16127MB of shared system memory
[0000.35] Log: Shader platform (RHI): PC-D3D-SM3
[0000.50] Log: PhysX GPU Support: DISABLED
[0000.50] Init: Initializing FaceFX...
[0000.51] Init: FaceFX 1.7.4 initialized.
[0002.74] Init: Finished loading startup packages in 2.09 seconds
[0002.75] Log: 82449 objects as part of root set at end of initial load.
[0002.75] Log: 0 out of 0 bytes used by permanent object pool.
[0003.43] Log: Supported Consoles:
[0003.43] Log: IPhone
[0003.43] Log: Mac
[0003.43] Log: PC
[0003.43] Log: Initializing Engine...
[0003.57] Log: Encountered missing default brush - spawning new one
[0003.58] Init: UEngine initialized
[0003.58] Log: Primary PhysX scene will be in software.
[0003.58] Log: Creating Primary PhysX Scene.
[0003.59] Init: Transaction tracking system initialized
[0003.60] Log: Can't find edit package 'OnlineSubsystemGameSpy'
[0003.60] Log: Can't find edit package 'OnlineSubsystemLive'
[0004.15] Init: XAudio2 using 'Speakers (High Definition Audio Device)' : 2 channels at 44.1 kHz using 16 bits per sample (channel mask 0x3)
[0004.21] Init: XAudio2Device initialized.
[0004.26] Log: WinTab initalized successfully.
[0004.26] Init: Client initialized
[0004.26] Init: Editor engine initialized
[0004.37] Log: Initializing Engine Completed
[0004.37] Log: >>>>>>>>>>>>>> Initial startup: 4.37s <<<<<<<<<<<<<<<
[0004.44] Cmd: MODE MAPEXT=udk
[0004.58] SourceControl: Source Control disabled in UDKEditorUserSettings.ini. [SourceControl] has Disabled=True
[0006.88] Log: Found D3D11 adapter 0: NVIDIA GeForce GTX 780
[0006.88] Log: Adapter has 2994MB of dedicated video memory, 0MB of dedicated system memory, and 16127MB of shared system memory
[0008.63] Cmd: MAP LOAD FILE="..\..\Engine\Content\Maps\Templates\Template_MidDay.umap" TEMPLATE=0
[0008.88] Log: Encountered missing default brush - spawning new one
[0009.19] Log: New File, Existing Package (Package Untitled_2, Package template_midday)
[0009.30] Log: -- Checking Building LODs
[0009.31] Log: Primary PhysX scene will be in software.
[0009.31] Log: Creating Primary PhysX Scene.
[0009.32] Log: Finished looking for orphan Actors (0.008 secs)
[0009.33] Cmd: MAP CHECKDEP DONTCLEARMESSAGES DONTDOSLOWREFCHECK
[0009.33] Log: TIMER ALL OF INIT : [8.818660]
[0012.93] Log: Built Phys StaticMesh Cache: 3.810 ms
[0012.93] Log: COOKEDPHYSICS: 0 TriMeshes (0.000000 KB), 2 Convex Hulls (2.164063 KB) - Total 2.164063 KB
[0013.07] Log: Save=146.121460
[0013.07] Log: Moving 'C:\UDK\UDK-01\Binaries\Win64\..\..\UDKGame\Autosaves\UEDP****itled_2_save.tmp' to 'C:\UDK\UDK-01\Binaries\Win64\..\..\UDKGame\Autosaves\UEDP****itled_2.udk'
[0049.57] Log: Built Phys StaticMesh Cache: 3.652 ms
[0049.57] Log: COOKEDPHYSICS: 0 TriMeshes (0.000000 KB), 2 Convex Hulls (2.164063 KB) - Total 2.164063 KB
[0049.70] Log: Save=131.610789
[0049.70] Log: Moving 'C:\UDK\UDK-01\Binaries\Win64\..\..\UDKGame\Autosaves\UEDP****itled_2_save.tmp' to 'C:\UDK\UDK-01\Binari]