I have created a bootable usb stick having Ubuntu 13.10.
When I boot my laptop, it boots from the usb. I proceed to install Ubuntu 13.10. Ahead, I get the below options. You see here the option of 'erase disk & install ubuntu'. This will delete everything on my laptop. But I was expecting the option of 'erase ubuntu 12.10 & reinstall' to appear. So, I feel that the installer fails to detect my current Ubuntu 12.10 If so, then what to be done so that my O.S is detected.
I would appreciate if one can share what options they get when they install from bootable usb ubuntu 13.10.