...I just started Factorio. It crashed and told me to post the logfile here:
I'm a bit surprised since there are some paths to a cygwin64 directory, but c:\cygwin64\ does not exist on my machine. Neither does f:\dd\. When I tried again, Factorio started no problem, so this may a non-reproducible Heisenbug, sorry.0.002 2016-01-02 21:02:52; Factorio 0.12.20 (Build 17489, win64)
0.002 Operating system: Windows 7 Service Pack 1
0.002 Program arguments: "F:\Factorio012\bin\x64\Factorio.exe"
0.002 Read data path: F:/Factorio012/data
0.002 Write data path: C:/Users/malte/AppData/Roaming/Factorio
0.002 Binaries path: F:/Factorio012/bin
0.111 Available display adapters: 1
0.112 [0]: \\.\DISPLAY1 - AMD Radeon HD 6670 {0x8000005, [0,0], 1600x1200, 32bit, 85Hz}
0.112 Create display on adapter 0. Size 1280x720 at position [150, 222]. Monitor 0
0.502 Initialised Direct3D:[0] AMD Radeon HD 6670; driver: aticfx64.dll 8.17.10.1172
Factorio crashed. Generating symbolized stacktrace, please wait ...
c:\cygwin64\tmp\factorio-s8xnhp\libraries\stackwalker\stackwalker.cpp (923): StackWalker::ShowCallstack
c:\cygwin64\tmp\factorio-s8xnhp\src\util\logger.cpp (284): Logger::writeStacktrace
c:\cygwin64\tmp\factorio-s8xnhp\src\util\logger.cpp (338): Logger::logStacktrace
c:\cygwin64\tmp\factorio-s8xnhp\src\util\crashhandler.cpp (81): CrashHandler::writeStackTrace
c:\cygwin64\tmp\factorio-s8xnhp\src\util\crashhandler.cpp (139): CrashHandler::SignalHandler
f:\dd\vctools\crt\crtw32\misc\winxfltr.c (372): _XcptFilter
f:\dd\vctools\crt\crtw32\startup\crt0.c (267): __tmainCRTStartup$filt$0
f:\dd\vctools\crt\crtw32\misc\amd64\chandler.c (162): __C_specific_handler
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 000000007755905D)
000000007755905D (ntdll): (filename not available): RtlDecodePointer
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 0000000077548C0F)
0000000077548C0F (ntdll): (filename not available): RtlUnwindEx
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 000000007757D948)
000000007757D948 (ntdll): (filename not available): KiUserExceptionDispatcher
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\d3d_bmp.cpp (577): _al_d3d_sync_bitmap
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\d3d_bmp.cpp (1085): d3d_lock_region
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\bitmap_lock.c (108): al_lock_bitmap_region
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\bitmap_pixel.c (64): al_get_pixel
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\wmcursor.c (416): get_dib_from_bitmap_32
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\wmcursor.c (461): local_stretch_blit_to_hdc
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\wmcursor.c (123): _al_win_create_icon
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\wwindow.c (1005): win_set_display_icon
c:\cygwin64\tmp\factorio-s8xnhp\libraries\allegro\src\win\wwindow.c (1027): _al_win_set_display_icons
c:\cygwin64\tmp\factorio-s8xnhp\src\graphics\display.cpp (164): Display::Display
c:\cygwin64\tmp\factorio-s8xnhp\src\globalcontext.cpp (524): GlobalContext::loadAllegro
c:\cygwin64\tmp\factorio-s8xnhp\src\globalcontext.cpp (300): GlobalContext::init
c:\cygwin64\tmp\factorio-s8xnhp\src\mainloop.cpp (526): MainLoop::run
c:\cygwin64\tmp\factorio-s8xnhp\src\main.cpp (415): wmain
f:\dd\vctools\crt\crtw32\startup\crt0.c (255): __tmainCRTStartup
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 0000000077325A4D)
0000000077325A4D (kernel32): (filename not available): BaseThreadInitThunk
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 000000007755B831)
000000007755B831 (ntdll): (filename not available): RtlUserThreadStart
4.765 Error Util.cpp:63: Unexpected error occurred. You can help us to solve the problem by posting the contents of the log file on the Factorio forums.