Can I run MYM12 on my new computer that has a version of Windows 64-bit ?

YES! Many of us MYMers are running MYM12 in the 64-bit versions of Windows 7, 8, 8.1 or 10.

Microsoft removed the ability to run older DOS programs in the 64-bit versions of Windows. So, you can no longer simply install and run MYM in a Command Prompt in Windows like you could in Windows XP. In order to run MYM12 (or any other DOS program), you first need to run a DOS emulator to replicate the old DOS Prompt. Lucky for us, there are a couple of FREE (although I hope you consider donating to their development team) emulators available for download, DOSBox and vDOS. Personally, I am using vDOS in Windows 10 to run MYM12. I found vDOS to be easier to set up than DOSBox. Overall, the experience of running MYM12 in vDOS is excellent and launching the shortcut from the Desktop will automatically launch all of the necessary "stuff" in the background (transparent to the user) and MYM12 will run just like it did in XP. I've also found that vDOS will run when DOSBox sometimes has problems. Of course, because MYM is running in an emulator, it may not run as quickly as it did directly in XP depending on the size of your data.

NOTE: If you have any trouble with these instructions, please contact me and I'll send you a CD with MYM12, the fully configured emulator, and all of the utilities pre-loaded so all you will need to do is Copy/Paste the contents of the CD to your hard drive.


To run MYM12 in Windows 64-bit:

These are the steps, or you can skip to below where I put links to copies of my exact files.

1) Download and install vDOS (or DOSBox). I installed it into the root c drive (c:\vDOS).

2) Review the installation instructions for vDos to see how to set up vDos for use. It's simple to modify the autoexec.txt and config.txt in Notepad to run MYM12. In the autoexec.txt, you can configure the folder in which MYM12 will be installed. In the config.txt, you can configure additional settings like activating the mouse, screen size, borders, fonts, etc. It's very simple to go through the file to configure the settings.

3) Run vDOS to get a DOS Prompt with the settings established in the prior step.

4) Within the vDos window, run the MYM12 installation program to install MYM. Follow MYM installations steps for a successful install. I installed MYM12 into the root c drive (c:\MYM12).

5) Now that MYM12 is installed, review the vDos configuration files set in Step 2.

6) Modify the autoexec.txt file to run MYMLOCK.BAT to launch MYM. Please see instructions for setting up MYMLOCK.BAT to protect your data in Windows.

7) Create a shortcut on your Windows Desktop to run vDos. When you launch this shortcut, vDos will start and the autoexec.txt will then launch MYMLOCK which will then launch MYM12. Right-click on the Desktop icon to set the icon to the MYM12 icon so it looks just like it did in XP.


8) If needed, you can make further configuration changes to the config.txt file which will take effect the next time you launch the shortcut.

9) Because MYM in vDOS does not detect a usb/flash drive for storing backps automatically, I created a backup utility to automate the backup process when exiting MYM12. View information about the backup utility.


Here are examples of the configuration files I use for vDOS.

You can edit the AUTOEXEC.TXT file in the vDOS folder and add the following lines to the end of the file. OR, you can download my exact copy of AUTOEXEC.TXT here and put it in the vDOS (c:\vDOS) folder.



You can edit the CONFIG.TXT file in the vDOS folder to enable Mouse support be removing the "REM" in at the beginning of the line where the Mouse is activated. OR, you can download my exact copy of CONFIG.TXT here and put it in the vDOS (c:\vDOS) folder.


REM Mouse = ON


Mouse = ON


Put this MYMBack.exe file in the MYM12 folder (c:\MYM12). (This will launch after exiting MYM to automate the backup process to back up your dataset.)

Put this MYMLOCK.BAT file in the MYM12 folder (c:\MYM12). (This only allows you to run a single instance of MYM12 to protect your data.)

Put this MYM12 Icon file in the MYM12 folder (c:\MYM12). (This is the graphic icon file that will appear on your Desktop. Since a .ico file cannot be transferred directly, I renamed this file to After downloading this file, rename it to MYM12.ICO and put it in your MYM12 folder. You can then update your Shortcut to use this icon.)

Put this MYM12 Shortcut on your Windows Desktop. (This launches vDOS which launches MYMLOCK which launches MYM! Since a .lnk file cannot be transferred directly, I renamed this file to After downloading this file, rename it to MYM12.lnk and put it on your Desktop.)

You're all set!

You now have MYM12 completely set up in Windows 64-bit and all you need to do is double-click on the MYM12 icon on your Desktop to run MYM.