how do i unistall windows i need to get this done?
You can whipe the drive clean using different tools or you could just do a new install of windows on the drive. What are you trying to do?
the hole drive
format the drive, you could use gparted on a usb, either the standalone version or it's preinstalled on most linux live installers
like to say im installing elementry os and then it gives me an option to blank the drive?
Yes, most linux distros offer and option to split the drive or a full format. Most distros also come with gParted on the live disc which allows you to create partitions how you want easily
ok i have a linux box now thnaks