- Download the latest zip file from GRUB for DOS and extract the file grldr to C:\
- Run cmd and type:
attrib +r +s +h boot.ini
- Append the line
to the operating systems section, which is usually last. Save and quit.
attrib -r -s -h boot.ini
- Reboot and select GRUB from the boot menu.
- From the grub prompt we can repair the system:
root (hdX, Y)
Take care with boot.ini as invalidating this file can render the system unbootable. In this case you must boot by another method, e.g. network, USB, CD or floppy.