GRUB and a problem on booting to Windows XP

[Jarkko Elfving]

Hi...

My GRUB doesn't boot to my Windows XP part for unknown reason. It were
working yesterday and before that great (GRUB configures is not
modified). The problem appears right after defraging the hard drive. I
used for it a Norton's SystemWorks 2004. I've read that same kind of a
problem has shown before. Then they can "fix" the problem without
re-installing. But they didn't tell how they did it!

I've now reading the book of Windows XP and it says that any register or
boot sector error is fixable by using a Windows XP CD-ROM.

I'm just moved from Windows to Linux and I've still some empty blocks on
some basic questions where I didn't found answer from some books of
written on Linux I've reading on.

While I installed the Fedora Core 2, the GRUB was installed on same HDD
with Windows XP (that was my "foult"). Windows XP was boot normally with
these GRUB conf's:

	title Windows XP
	rootnoverify(hd0,0)
	chainloader +1

And after the defraging this problem appears.

And the question is:
If I use the Windows XP CD-ROM to fix the problem (it means that I think
that I've figured out what causes the main problem on booting) and IF I
make some mistakes or Windows does something that I don't want it to do
(it is possible, in Windows anything is possible :D) and something
happens to my GRUB (what means I don't have any options to boot on
Linux), how I re-install the GRUB back on to my system? I think that I
don't have to re-install the whole system if only GRUB is missing or
corrupted.

I'm sorry for bad english and confusing description of my situation, but
my wife likes to use the Windows and it's impossible for now.

-- 
Jarkko Elfving
Suomi - Finland
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