How to install the pure DOS method under Winnt/2k/xp _dos/bat

Now many netizens are using WINNT/2K/XP and other operating systems. However, when they started the winnt/2k/xp, they found that many DOS programs were unable to run on it and could not use pure DOS. What the hell is going on here?
As you know, there's a "command prompt" in winnt/2k/xp that looks similar to the MS-DOS window in win3.x/9x. However, they are completely different. Win3.x/9x is a GUI interface enhancement program for large protection modes running in MS-DOS, while WINNT/2K/XP is an independent operating system based on OS/2 and NT components, so there is an essential difference between them. The real dos is pure DOS, such as MS-DOS and Pc-dos, and the command prompt in WINNT/2K/XP is just a "Winnt system console" with a section of "DOS Virtual Machine" features. Since it is virtual, the effect of nature does not really good. Therefore, when this "virtual DOS" fails to run the DOS program properly, only real DOS (such as MS-DOS 7.10) is used to run them.
Since WINNT/2K/XP does not have DOS, you can only use dual booting if you want to install a pure DOS system with your hard disk after installing these operating systems. Many users know that winnt/2k/xp startup often appear a menu, from which you can select the operating system to start. However, sometimes this menu does not have the "DOS" option, even when the boot menu does not appear at all (if you choose to keep the original operating system when you install WINNT/2K/XP, the original operating system option will appear in WINNT/2K/XP's boot menu). So what should we do? The following is a description of how to install DOS after installing WINNT/2K/XP.
DOS boot sector and boot files are required for the start of the system. The DOS installer automatically rebuilds the DOS boot sector and boot files when it is installed, so you can start the DOS after installation. However, for older versions of DOS (such as MS-DOS 6.x), their installer overrides winnt/2k/xp boot information, causing WINNT/2K/XP to fail to start. This is also the case with command transmissions such as the SYS with DOS. Therefore, in order to enable both DOS and WINNT/2K/XP to start, it should be done in a better way, or automatically with DOS setup that can be automatically made into DOS and WINNT/2K/XP dual boot.
MS-DOS 7.10 is the most powerful, practical, and best-compatible DOS of all time. And because it fully supports large hard disk, large memory, long file name (LFN), FAT32 partition, may directly start win3.x/9x and so on, so very practical. and its installation program on the full support and winnt/2k/xp coexist. "MS-DOS 7.10 Full installation Version" (can be downloaded in "DOS system") in the installation allows the system to automatically complete the installation of the WINNT/2K/XP under the full DOS version of the operation, and automatically implement DOS and WINNT/2K/XP dual-boot. Because the MS-DOS 7.10 Full installation version is very powerful and practical, it is recommended for everyone to use. More details can be found in the full installation version of pure MS-DOS 7.10.
However, if the primary partition of the hard disk (usually the C disk) is in NTFS format, it is not possible to install DOS directly because DOS does not directly support the NTFS format. This can be accomplished with a number of boot managers, such as Spfdisk. With the multiple Boot Disk Manager set up the system partition, the direct installation of MS-DOS 7.10 to achieve coexistence with WINNT/2K/XP.
     also, in addition to installing DOS or starting DOS with a real DOS boot floppy disk, you can use the virtual floppy image method to start the DOS, which is from winnt/2k/ XP boot menu directly starts the virtual DOS boot floppy in DOS, which is equivalent to booting from a DOS boot floppy. Can be achieved by using Vfloppy, Grub for ntldr and other software, can be seen in the China DOS Alliance forum. However, please note that using a virtual floppy or a real floppy disk to boot to DOS is not installed DOS, if you want to really install DOS, you need a DOS installer to install automatically.