When you try to initiate Windows XP after you install Windows 2000, you can have received the following error message:

When Starting Windows -
Windows 2000 could not be starting because the following file is missing or corrupt: \WINDOWS\SYSTEM32\CONFIG\SYSTEM.

You can attempt to repair this file by starting Windows 2000 Setup using the original Setup floppy disk or CD-ROM.
Select 'r' at the first screen to start repair."

If the Windows XP install was an upgrade from Windows 2000, you may instead receive the following error message on a blue screen while attempting to start Windows XP:

BAD_SYSTEM_CONFIG_INFO
STOP 0x00000074

This issue comes out as Windows XP was not there when Windows 2000 got release. The Windows 2000 bootstrap loader files are not having ideas of the changes that have been made in Windows XP. The computer supposes to have these changes to load Windows XP.


To work about this issue, start the computer in Windows 2000, and then you need to copy the NTLDR and Ntdetect.com files from the I386 folder on the Windows XP CD-ROM to the root of the system drive to avoid it.

Even though a workaround for this issue is devised in this article, you only can have a dual Startup when you need to install Windows XP in a different partition after you install Windows 2000.