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.>
Answer given by Assad is absolutely right and worked well for me too.
This is just an Exception Case.
After you type in the Octave command line : graphics_toolkit
If the answer is qt instead of fltk, then probably your PC needs to be installed gnuplot separately from SourceForge as Octave gets some errors while installing itself in W8/10.
Here is the link attached. https://sourceforge.net/projects/gnuplot/?source=directory
You don't need to change any installation files.
This should work