Error while Booting Ubuntu 14.04

Recently I upgraded to Ubuntu14.04, whenever Boot loader starts, Getting an error message Error : file not found for 3 seconds and OS starts loading, While Loading OS also getting same error Message:

Error : file not found 
Error : file not found 
Error : file not found 

Press Any Key to Continue

until unless i press the key the OS is not loading.

Please provide me a solution to avoid those error messages.

Solution 1:

First, for what is discussed in forums and in Launchpad just try:

sudo grub-install /dev/sdX

sudo update-grub

sudo reboot 

And there is a useful comment in Kubuntu's forum:

www.kubuntuforums.net

I have the same issue with a laptop with ubuntu as the only operating system with a non-UEFI bios.

I hope it helps.