my freshly built computer crashes when i go to web sights after installing flash player 11.6.602.171

os windows 7 service pack 1 and all windows updated fully ie 9 downloaded flashplayer 11.6.602.171 went to go to cnet.com computercrashed uninstalled it was able to go their and download some programs then installed it again tried to go to facebook and the computer crashed again  uninstalled it again and was able to go to facebook no problem please help i need flashplayer to work