Error 21

[jamsh]

I have just installed Kubuntu and when I rebooted I got the following - Grub loading stage 1.5
Grub loading, please wait..
Error 21

Please help....my only access to my computer now is via the 'Live' CD !

[Pumalite]

http://users.bigpond.net.au/hermanzone/p15.htm#21