I have tried using the update-manager to upgrade from 12.10 to 13.10. After it checks for updates, it shows that 13.10 is available and asks if I want to upgrade.
I say yes and then it downloads two files and give me an error message saying the upgrade cannot be done with this tool.
I have searched and searched. When I create a bootable 13.10 flash drive and try to install, it only wants to override my entire disk. When I try manual, things do not get much better.
If I cannot get this to work, how might I remove Ubuntu 12.10 and the GRUB 2.0 boot manager?