When bi-system was installed in one computer,especially both windows andLlinux, we may reinstall one of them. The Grub of Linux would be destroyed when the windows system is update and it would be necessary to reinstall Grub in this case, otherwise we have to reinstall the whole Linux OS.
Command for Grub repair in SUSE :
1. insert SUSE OS DVD and boot from "Rescue System"
2. Login with root
3. execute: find /boot/grub/stage1 you should observe something like: (hd0,6)
4. enter Grub shell environment with command "grub"