converting unix exe to windows binary

[jacek]

I don't think that you will find a tool that would do such thing. Better try the normal approach and simply compile your project on windows. You can use MinGW toolchain for this. Since you use Qt, there shouldn't be any problem with porting your source code to windows (unless you have used some Linux specific mechanisms).

[high_flyer]

in addition to what jacek said, you could also try to use Cygwin.