Major Description
2nd stage in ReactOS calls the export InstallReactOS in syssetup. However, that export in syssetup is called InstallWindowsNt in Windows. So that means our setup/syssetup is incompatible with the Windows counterparts. Basically if you replace our syssetup with the one from Windows before 2nd stage, it won't work because our setup is programmed to call InstallReactOS which does not exist in the Windows version.