I am trying to install Ubuntu 12.04 from disk. I have partitioned my hdd so Ubuntu can be installed in it's own partition, i do not want to run it along side windows 7 which is already installed on my desktop.The problem i have is half way through the instillation, when i define which partition i want it to install on. The message i get is. ( No root system is defined, Correct from partition menu.) As i do not want it in the same partition as Win 7 that's as far as i get. i have tried a number of times, but cannot get past this message. I must be able to install Ubuntu in it's own partition but how!. My file system is NTFS.