Same exact issue here. I solved it by changing my PATH variable and making it shorter without parentheses. Seems to be an unsolved bug from a long time ago:
https://bugreports.qt.nokia.com//browse/QTSDK-32
This is my PATH which causes the crash:
C:\Qt\qtcreator-2.3.1\mingw\bin;C:\Qt\4.7.3\lib;C:\Qt\4.7.3\bin;C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4.0\bin;C:\Program Files\ImageMagick-6.6.3-Q16;C:\Program Files (x86)\MiKTeX 2.8\miktex\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\CMake 2.8\bin;C:\Program Files (x86)\doxygen\bin;C:\Program Files\MATLAB\R2009b\runtime\win64;C:\Program Files\MATLAB\R2009b\bin;C:\Program Files\SlikSvn\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\NVIDIA Corporation\Cg\bin;C:\Program Files (x86)\NVIDIA Corporation\Cg\bin.x64;C:\Program Files (x86)\OpenLibraries\bin;C:\Program Files\Microsoft Windows Performance Toolkit;C:\Python26\Scripts;C:\Program Files\Intel\DMIX;C:\Program Files (x86)\Aspera\Client\bin;%JAVA_HOME%\bin;C:\Program Files (x86)\UnixUtils;C:\Program Files (x86)\QuickTime\QTSystem;C:\Program Files (x86)\Graphviz 2.28\bin;C:\Program Files (x86)\Mscgen;C:\Program Files (x86)\Apache Software Foundation\apache-maven-2.2.1\bin