After new install - first launch was from steam. Made no settings changes. Created a career mode game. Clicked research building and exited, clicked mission control building and exited, clicked VAB and crashed on load. All subfolders in KSP dir are read only. No error log was generated by KSP. The windows exception threw: Problem Event Name: APPCRASH Application Name: KSP.exe Application Version: 4.5.2.26843 Application Timestamp: 53bac1e4 Fault Module Name: StackHash_9412 Fault Module Version: 6.3.9600.17114 Fault Module Timestamp: 53648f16 Exception Code: c0000374 Exception Offset: PCH_32_FROM_ntdll+0x000735D4 OS Version: 6.3.9600.2.0.0.256.48 Locale ID: 1033 Additional Information 1: 9412 Additional Information 2: 9412035320650541430a04df3fd15444 Additional Information 3: e944 Additional Information 4: e944766475f9417af6648122c8da6800 which isn't very helpful. Next I tried deleting settings.cfg and launching from KSP.exe. Game loads, clicked VAB...no crash this time, but graphics don't load properly. Turned off antialiasing and lowered render and texture settings. No improvement, outside a comforting pixelated patina. Guessing at where the controls were, I was able to build a little ship and launch it. Physics hit okay...in fact things worked well except for some unexpected behavior with the inertial path reticule. Decided to try to go full screen and raise the render quality a bit. Game didn't crash but monitor lost input until I opened task manager. Forced a quit, no error logging of any kind. Downloaded and installed GeForce 344.11 drivers for my GTX 560. Deleted settings.cfg and launched from KSP.exe. Same issues. Exiting the VAB crashed the game and threw a KSP error log this time though: Unity Player [version: Unity 4.5.2f1_9abb1b59b47c] KSP.exe caused an Access Violation (0xc0000005) in module KSP.exe at 001b:00685c7d. Error occurred at 2014-10-09_224218. C:\Program Files\Steam\steamapps\common\Kerbal Space Program\KSP.exe, run by Arophon. 91% memory in use. 3309 MB physical memory [277 MB free]. 0 MB paging file [487 MB free]. 2048 MB user address space [61 MB free]. Write to location 00000000 caused an access violation. Context: EDI: 0x00122524 ESI: 0x7e4d071c EAX: 0x0000244a EBX: 0x00000000 ECX: 0x00000000 EDX: 0x00000024 EIP: 0x00685c7d EBP: 0x09ccf680 SegCs: 0x0000001b EFlags: 0x00010212 ESP: 0x09ccf650 SegSs: 0x00000023 Bytes at CS:EIP: 66 0f 7f 01 66 0f 7f 41 10 66 0f 7f 41 20 66 0f