C:\WINNT\SYSTEM32\AUTOEXEC.NT. error

I am trying to install ts client on a Windows 2000 client machine and am getting this error - can anyone help please

‘C:\WINNT\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for running MD-DOS and Microsoft Windows applications. Choose ‘Close’ to terminate the application.’
 
Extract the original autoexec.nt from your Windows CD and replace the corrupt one you have.
 
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