how to install ubuntu beside win 8?

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http://askubuntu.com – i tried to install a ubuntu beside win 8 by downloading it from ubuntu website and downloaded wubi application to set it up from windows, after install it requires restart to continue setup then, it hangs up on restarting window for more than 15 mins so i tried to force it to shutdown by holding the power key. after turn it on, laptop (hp ENVY m6-1105dx) gives me a error message that there are something missed and can't continue install of ubuntu then it gives two option (enter and ESC ) enter to choose OS want to run i tried ubuntu but didn't work. so what should i do install ubuntu beside wi (HowTos)