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Warning: Do you have the first page? It contains all the essential preparation and safety information you need before you can continue here. If you do not already have that page then you must click the following link and select the correct dual, triple or multi-boot. You'll find it at http://thpc.info/dual/dual_win7.html (new window)

Now Install MS-DOS 7.10 and Dual-Boot with the installed Windows 7

Installing MS-DOS 7.10 on the previously prepared FAT32 Primary partition at the end of the first hard disk does not make any changes to Windows 7 which will continue to boot normally.

If you don't have a floppy drive, download win98se_bootdisk.iso and use Windows 7 to create the MS-DOS 7.10 bootable CD (in Windows Explorer, right-click the win98se_bootdisk.iso file and select Burn ...). It pretends it's a floppy!

1. Bootup from a Win98SE boot floppy or from a Win98SE or MS-DOS 7.10 bootable CD/Flash drive.
   • At the A:\ Prompt, type (and press Enter)
     SYS C:
     - this creates a DOS boot sector on the FAT32 partition and installs a very basic MS-DOS 7.10
   • Remove the floppy or CD/Flash drive.
2. Restart computer (CTRL-ALT-Del). Windows 7 will bootup normally (the Active flag has not been moved).

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   Next use EasyBCD 2.1 to add the MS-DOS 7.10 boot option to the Windows 7 boot loader menu.

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3. With Windows 7 booted,
   Install/Run EasyBCD 2.1 (click Yes for "User Account Control").
   • Select Add New Entry in the left pane.
   • Select the Windows tab in the upper right pane.
     • In Type drop-down, select Windows 95/98/ME (not MS-DOS 6.x).
     • In Name, rename "Microsoft Windows 9x" to MS-DOS 710.
     • In Drive, you'll see it is "Automatically configured". That's correct.
     • Click the Add Entry button in the same pane.
   • Optionally, you can now modify the timeout of the boot loader menu
     - click the Edit Boot Menu (left pane) and set the Boot default OS after to about 5 seconds.
   • Exit EasyBCD.
   Restart computer. Both Windows 7 and MS-DOS 7.10 are bootable from the Windows 7 boot loader menu.

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4. Add the rest of the MS-DOS 7.10 files at your leisure using the same file versions.
   Add/Edit Config.sys, Autoexec.bat, and perhaps Msdos.sys, to suit your own requirements.