What just happen? Grub read error message

[Alex Janssen]

Brittany Fleischer wrote:
> My system was working very good when my computer went to scrrensaver mode, it then freezed my system to the point where I had to push the power of button. 
>
> Now I am recieving "grub error" messages along with auto restart when I try to start up my system. I then get the error:
>
> Boot from (hd0,0) ext3 5ec9b9c0-238e-49a9-8c09-81460343f436
> Starting up
> Uncompression error
>
> --System halted"
>
> What is going on? I hope i don't have to reload ubuntu because I do have some important files that I am wanting to save.
>
> Brittany
>
> Sent from my iPhone
>   
During boot, press ESC to get to the grub menu.  Select the recovery 
mode entry closest to the top and press enter to boot it.
Let us know if it boots.
Alex

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