The problem occurs because of a mismatch of the kernel files.
To resolve this problem:
1. Start the Recovery Recovery and log on to the Windows 2000 Professional operating system instance.
2. Type the following commands, pressing Enter after each line:
cd C:\Winnt\System32 ren Ntoskrnl.exe ntoskrnl.bad cd C:\Winnt\$ntuninstallq811493$ copy Ntoskrnl.exe C:\winnt\system32Exit