General Windows system freeze with setTimer

The following problem only happens in this context:
1) Visual Studio 2012
2) Windows 7 64 bit.

I insist on this, because the problem does not happen in Windows 8, nor with Windows 7 32 bit, nor with Visual Studio 2010.
However it happens for code both in 32 and 64 bit.

The following small application causes the entire Windows system to freeze as soon as you click the window caption bar and try to move it. The only solution is to press "Alt + Ctrl + Del" to open the Task Manager.
Setting startTimer(1) does not cause this problem.
That problem remembers me some old stuff in qeventdispatcher_win.cpp
(cf.
https://bugreports.qt-project.org/browse/QTBUG-12721
https://bugreports.qt-project.org/browse/QTBUG-6083
)

I should add:

• Problem is 100% reproducable.
• The problem happens on different machine, including on a fresh Windows 7 installation
• I could guess the problem is more on the side of the MS dynamic run time library, because if (in Visual Studio 2012) I select "Visual Studio 2010 tool set" rather than the default "2012 tool set", the problem still happens.

#include <QtGui>

int main(int argc, char** argv)
{
  QApplication app(argc, argv);
  QMainWindow mw;
  mw.show();
  mw.startTimer(0);
  return app.exec();
}