Error 21
 

First of all my setup with the computer is a dual boot with windows vista on the main drive and ubuntu gutsy on the external drive. ANYWAYS, i moved my computer to a lan-party it worked fine their with the dual boot but now im back home i have everything setup like i had but i keep getting this error 21

fixed, problem was that i didn't plug in the power all the way in... i noticed it when the blue light wasnt on (its very dim light...)

Start your system in recovery mode and at the promp type

startx

then open

Applications>>Accessories>>terminal

and edit your menu.lst file

gksudo gedit /boot/grub/menu.lst

The remove the line

savedefault

then save

close the terminal

log out

at the promp

type reboot