You say that you do not have a startup disk for Windows 2000. Is that a
"startup" floppy (aka Emergency Repair Disk) or are you talking about
the Windows 2000 CD used to install the operating system? The startup
floppy will not have a copy of ntoskrnl.exe (see "What's on an ERD" at
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnntpro00/html/ntp0063.asp).
It has enough to perform the loading of the OS but does not replace or
usurp the OS files.
If you have the Windows 2000 CD then boot from it and select the Repair
option. That should replace missing or corrupted system files.
However, if your "installation" media (on CD) is really just a disk
image, that is a snapshot of the files on the hard drive when the system
was new and using this restore disc will result in wiping out the hard
drive and laying down that old static image. It depends on how the
restore media was built. It may be a disk image. It may be a
compendium of files that simply get copied and you could find the file
there.
You stated "Win2000 came with my computer, so I have no software." If
you don't have the software as a Windows 2000 CD or restore CD, what
makes you think you have a legal copy of Windows 2000? Although I
personally have not experienced such a distribution, some users have
claimed the install/restore files were saved on their hard drive but
that means if the drive goes dead then you have no way to get at the
software to reinstall or restore it.
If you manage to find that software that supposedly got included in the
sale of the computer, and besides the above mentioned Repair function
(if you actually got a Windows 2000 CD rather than a restore CD), other
actions you could try is to boot into Recovery Console mode (if it was
previously installed but I suspect it won't work without ntoskrnl.exe,
or ran from the install/restore CD) and then copy the file but you'll
still need whatever install/restore media that should've been provided
to actually give you a legal copy of Windows 2000. Another option is to
perform a parallel install into a different directory, boot using that
parallel install, and use it to perform file copies but, again, you'll
need that Windows 2000 install or restore media.
It comes down to using that Windows 2000 that you say came with the
computer but which you can't find. If you purchased a retail copy of
Windows 2000 then you can call Microsoft to get a replacement but you'll
need some proof of ownership and there will probably be some media and
shipping costs. If Windows 2000 came pre-installed on the computer then
you need to ask the seller why they didn't include the CD for the OEM
version of Windows 2000. If the OEM version was pre-installed, there
should be a sticker on the computer with the product key. If they
simply included the OEM version in the sale then you got the CD for it
(so be sure to not just toss the shrinkwrap because that's where the
sticker is that you put on your computer). If the computer came with
restore image CDs instead of install CDs then you need to follow
whatever the vendor says is the recovery method in the documentation or
give their tech line a call; there are just too many ways to build a
restore image to give advice on how a file many be extracted, if even
possible. Be warned that if all the vendor provides is a restore image
then it wipes out your hard drive to lay down that image. Some vendors
provide a means of customizing the restore. You need to contact the
vendor in case they provided only their own custom restore media.
Simply getting a computer with a "dirty" hard drive that the prior owner
didn't bother to wipe is NOT getting the software legally with the
computer. You would definitely know if you had a legal copy or not and
pretending not to know insinuates yours is illegal. You would have the
installation CD. You would have the jewel case with the product key.
You would have confidence enough to call Microsoft to ask for a
replacement if it was a non-OEM version. You would have an OEM disc if
it was pre-installed. You would have restore discs if the computer
jobber designed custom install or recovery media. You would have a tech
line to call if it was a pre-installed OEM version but they didn't
included the CD (not likely but it does happen with some unprofessional
jobbers). You would have documentation, manuals, stickers, or something
to show you actually got Windows 2000 with the purchase of the computer.
Just having it on the hard drive is NOT proof that it is a legal copy.
Even those jobbers that only put the restore files on the hard drive
must provide you with some proof that you actually got a legal copy of
Windows, like a COA (Certificate of Authenticity). What *of* Windows
2000 do you actually have? If you were to call Microsoft right now,
what would you have to prove to them that you actually bought Windows
2000?
And when you call Microsoft, clean up your act. They'll probably
require that you be an adult before they release anything to you.