Grub prompt..what do I do?

[mdovell at comcast.net]

I decided to reinstall Ubuntu but it is stuck on GRUB 
Saying "GNU Grub version 1.97beta 4 
Minimal bash like line editing is supported. For the first word Tab lists possible command completion. Anywhere else tab lists possible device / file completions" 

prompt states sh:grub 

typing in startx or anything with sudo is not recognized. 

I'm using wubi for this but I'm not sure where this is going wrong. 
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