My hard drive is 250 GB with windows xp pro.
I have installed Open Suse and upon rebbot I got " GRUB Loading Error 18" message. Is there anyway to fix this problem?

Have you tried booting with a live cd, mounting your hard disk and taking a look at grub's config file? You could also try grub's web page for starters.

Try

##EDIT##--->http://wiki.linuxquestions.org/wiki/GRUB

If it doesn't help post your FULL system specs and error message.

What's the rest of your hardware like, and do you remember any details about how the SUSE install partitioned the drive? With older motherboards, GRUB will only work if the Linux boot partition is within the first 32gigs (if your Windows partition is bigger than 32gigs, then no go). It's disappointing if SUSE's installer didn't warn of any risk with this, but I wouldn't be surprised.

One way to fix this, at least so you can get into Windows, is to reset the bootloader to Windows's original (I forget off the top of my head how to do this for Windows XP, but it's something easy with a boot floppy).

Another is to go back into the SUSE installer and see if there's some option to use the LILO bootloader instead of the Grub bootloader. LILO does the same basic job as Grub, but it does it in a different way, so there's no 32gig restriction.

Thanks a lot.
I have HP Pavilion 8756C ( 850 MHZ cpu, 250 Mb Ram)
I used boot floppy and my windows is running again.
I am not sure about install partition and my windows partition is 50 Gigs. Is there anyway to work around this or I have to resize my windows partition?

This is worth a try. Create your own boot manager with this tool here:

http://neosmart.net/dl.php?id=1

worked for me with vista and kubuntu. Needed to reinstall Vista (don't ask long story) after Kubuntu and Vista likes to ignore Linux (surprise surprise). Easy BCD can create a boot loader for you to manage your OS's with a custom built one instead of grub. However, I'm not exactly sure how it would go for you now that GRUB is not working at all...but I'm using it now with no problems at all.

Any luck with fixing the issue?

Well, LILO doesn't have the 32gig limitation problem, AFAIK. See if SUSE has some option for installing LILO instead of Grub. I know that with Debian, the installer has a LILO option but it's only available if you choose an "expert" mode. Otherwise, the choice is skipped and the installer assumes the use of Grub.

Go into your BIOS and enable LBA mode for your hard drive.
Dont change anything else.

eddie

Unfortunately I did not have a chance to try out your suggestion. I will get back to you as soon as I do it. Thank you very much.

LBA mode was enabled.