emacs can not be exit in windows from cygwin

while using emacs in cygwin from windows 7,I find that key map from C-x C-c mapped to C-x C-g,which make me can not exit emacs

solution from internet add a windows variable as CYGWIN=tty.that will solve problems

another problems,access all folders in windows from cygwin

c driver

cd /cygdrive/c/program files

cd /cygwin/e/testfolder