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GRUB2 error



Hi

My wife let her Debian machine get over 450 packages behind before I caught it. What a mess. The last problem is that when booting up the Welcome to Grub notice appears and then:
        error:file not found
        Entering rescue mode
        grubrescue>

If I run "ls" I find that the root directory should be (hd0,msdos1) and that grub is under the /boot directory. Therefore I run:
        set prefix="(hd0,msdos1)/boot/grub"  <enter>
        set root="(hd0,msdos1)"  <enter>
        insmod normal  <enter>
        normal   <enter>
and the system boots up and runs fine; until I reboot and then the mess starts all over again. How do I fix this. I suspect that I need to somehow reset the grub file but that's just a SWAG. Help!!!!!

Oh yes, we are running Debian Wheezy (stable) and KDE desktop and fdisk gives the following:

root@supercrunch:/media# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000b79ef

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   960036863   480017408   83  Linux
/dev/sda2       960038910   976771071     8366081    5  Extended
/dev/sda5       960038912   976771071     8366080   82  Linux swap / Solaris


Gary R.

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