Invalid arch independent elf magic

[HBurd]

Hi,
I had Kubuntu 12.04 installed alongside Windows 7, and decided to replace Kubuntu with Xubuntu 13.04. In the installer I had to manually remove the Kubuntu partition and create a new one for Xubuntu. The installation finished without any errors.

Now when I try to boot, I get the message

error: unknown filesystem
grub rescue >

Following instructions from http://askubuntu.com/questions/142300/how-to-fix-error-unknown-filesystem-grub-rescue, I typed the following

grub rescue > set root=(hd0,msdos4)
grub rescue > set prefix=(hd0,msdos4)/boot/grub/x86_64-efi/
grub rescue > insmod normal


which gave me the error

error: invalid arch independent ELF magic

At this point I am pretty much lost. I tried this (http://ubuntuforums.org/showthread.php?t=1965810) but it didn't work. Any help would be greatly appreciated.

Thanks.

[oldfred]

Often a grub install version difference. Did Xubuntu install its grub correctly or are you really booting the old version and it is not working with the new?

Best to see details or this may reinstall grub correctly.

Post the link to the BootInfo report that this creates. Is part of Boot-Repair:
https://help.ubuntu.com/community/Boot-Info
Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
https://help.ubuntu.com/community/Boot-Repair
You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
LighterWeight (Lubuntu based) Boot-RepairCD
http://sourceforge.net/projects/boot-repair-cd/files/
Full Ubuntu 13.04 liveDVD or USB Install with Boot-Repair included (for newer computers)
https://help.ubuntu.com/community/LinuxSecureRemix

[hansdown]

Hi HBurd.

Is this a virtual machine install?

[HBurd]

Thanks, I just ran boot repair and it's fixed now.

Here's the boot-info anyway: http://paste.ubuntu.com/5950123/