I\'m using Windows 7 64 bit. Each time, I\'m using plot function, plot windows will shows and draws successfully, but after that it stops responding and must shut down it.>
I had the same problem in version 4.0.3 and switching the default toolkit to gnuplot as Assad Ebrahim said did not work for me. Then I find something in Octave for Microsoft Windows:
Current octave for windows ships a not full featured gnuplot. Therefore you cannot use the full features of gnuplot graphics toolkit
And there is instruction of how to download and install gnuplot. Hope it is helpful to you.