Install ubuntu as second operating system using windows installer

Step1: Go to Following Link(Windowsinstaller) and click on Get the installer.
Step2: Select any of the option at the bottom of page Not now,take me to download(free) or paywithpaypal(Donation).
Step3:Save the Wubi.exe file and install it after download.
Step4:Click on Continue and fill the options like installation drive,size,environment,username and password and press ok.
Step5:After the download click on reboot now.