How can i fix my dual boot if i have selected the wrong one? P.ex. Grub-Customizer allow you to choose wich boot do you want when you turn your pc... but, how can i fix if i select the wrong choice!?
(convert comment to answer)
Boot cd with your Ubuntu (If you have Natty 11.04 you can simply use your 10.04 cd...) try the experiment mode
Then install (as you have made in your system)
in update manager select the option "open source code software (Universal)"
In the terminal, install the packages (
Access to Grub and select root.
Your boot option (in case you have dual or triple boot) will appear again