After taking auto software update today, I reboot the computer using "reboot after update" option and then I got stuck at (grub>) prompt.
I have installed the latest version of UBUNtu from within Vista 32 bit.
I get the following message:

[ Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists the possible
completions of a device/filename. ]

Can someone shed some light?