MS Windows XP has become unbootable.

[Thomas Vaughan]

I have apparently done a bad thing, no doubt because of my own failure
to RTFM, and I'm wondering if there is a way for me to fix it.

Here is the output of 'fdisk -l':

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 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: 0x48cf583c

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63   155653784    77826861    7  HPFS/NTFS/exFAT
/dev/sda2       155653785   306086444    75216330   83  Linux
/dev/sda3       306086445   312576704     3245130    5  Extended
/dev/sda5       306086508   312576704     3245098+  82  Linux swap / Solaris

Using version 1.99-8 of grub-install on a Debian GNU/Linux (Unstable)
machine, I did

# grub-install --force /dev/sda1

Now, of course, MS Windows XP won't boot from /dev/sda1 when I select
it from the grub menu.

Instead, I see the word 'GRUB' printed on the screen and can
apparently do nothing more without rebooting.

I can still select to boot Linux from the grub menu, and that works well enough.

I'm hoping that I don't have to re-install MS Windows, especially
because I don't want the corporate IT folks to have to help me with
this.

Anyway, I'm wondering if there is anything that I can do to get MS
Windows XP to boot again.

BTW, I already had grub installed on the MBR (for /dev/sda), and I had
previously done

# grub-install --force /dev/sda2

while mucking around with a VMDK setup so that I could boot /dev/sda2
under VirtualBox.

-- 
Thomas E. Vaughan