ubuntu grub error 21 help?

Question

ok i was useing my parent's computer to install ubuntu on a 20 gig exetenal hard drive from a ubuntu live disk i burned and now when ever
i turn on my parents pc i get a grub error 21 and if i turn on the pc with
or without the hd i get the error and have no clue what to do help

Answer 1

GRUB Error 21 after full install to USB hard drive

http://www.pendrivelinux.com/grub-error-21-after-full-install-to-usb-hard-drive/



LUg.

Answer 2

Hi Curtis O



You just need 3 steps to repair ubuntu grub 21 error:



1: Download a registry cleaner and install it.

2: Open the registry cleaner and scan you computer for free

3: Click fix button and you done.



Download the top ubuntu grub 21 error repair tool here: http://www.fixerrorinstantly.com/tidpp-ubuntu_grub_21_error-zz0001

Answer 3

If you still have a Windows installation CD, you can use the Recovery Console by booting to the CD ROM and typing 'R' once the installer fires up. Login to the console and then type 'fixmbr' at the prompt to rewrite a new MBR and get rid of grub. If this does not work, repeat the process and type 'fixboot' instead. fixboot writes to the first slice of the disk, as opposed to fixmbr, which writes to the master boot record (MBR).

Answer 4

Oooh, sounds like your in trouble!!, but seriously, it sounds like Ubuntu jacked up your MBR or Master Boot record. You can fix it with the Windows Install CD, just boot of it and choose repair installation and windows will re-write the MBR, or google super grub disk, and use that iso (its free) to repair your MBR. next time use the Wubi Ubuntu installer, it doesnt touch your MBR and you can install Ubuntu right from windows.

Answer 5

Having an identical project myself, different than grub blunders sixteen. i got here across a itemizing of codes on line. nevertheless have not solved mine yet i haven't tried each little thing yet. 21 : chosen disk does no longer exist this mistake is lower back if the gadget area of a gadget- or finished document call refers to a disk or BIOS gadget that's no longer modern or no longer recognized by making use of the BIOS interior the equipment. I collect there is now GRUB2. We probable have GRUB1 which the record refers to.