procedure entry point NtFsControlFile could not be located...?

On an WinXP box, every time we go to open any app, we get a message, "procedure entry point NtFsControlFile could not be located..."  and I can't find much of anything written about this one out on the interwebs.  Opening "My Computer" or "My Network Places" doesn't bring the error up.

Any ideas?  If there's a solution short of re-RISing the machine I'd like to know.  Thanks.
ctpctpctpAsked:
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qz8dswCommented:
"NtFsControlFile, that is used to send FSCTLs to a file system from a Win32 program."
It's used by things like the disk defragger.
The actual function exists in a file called NTDLL.DLL

Thats a pretty vital file.
Do a sfc /scannow and check all your winodws files are actually valid for a start.
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ctpctpctpAuthor Commented:
Turns out that without a good NTDLL.DLL file I couldn't even bring up a comand line window, so I took out the HD, put it in another working machine, dragged over a copy of the file, reinstalled the HD, and then I could run sfc.exe - and as far as I can tell it was successful.

Thanks for the info on the file name...since you wrote first (and so far are the only one who has) you get the points.
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qz8dswCommented:
No worries.
Glad it was that simple, but don't know what would have replaced NTDLL.DLL though.
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