It runs a copy of Windows, Linux, DOS, or other operating system as if it were a physical machine, completely separate from your actual, physical computer. Your physical computer can be running Windows, and the virtual computer inside it can be running Linux; or the. Originally, this page was written for Windows XP alone but Windows Vista has a similar capability. That is described below. Windows XP Many older computer programs may not run correctly if you just click on the program's executable file in Windows XP; this is particularly. Basically, this action creates a PIF file that Windows uses to determine options to use to run the program in compatibility mode instead of native Windows 32-bit mode. Hopefully, this will allow the program to run. DOSB ox project. DOSB ox emulates an Intel x86 PC. It is a developing option because the project is still refining the code. But, you can find it at its Sourceforge home. t/p?show_news1 FreeDOS An MS-DOS emulator called FreeDOS has finally been released in version. A virtual machine or emulated computer is, in effect, a computer that does not exist as a physical box, only as a window in the physical computer on your desk. A virtual machine or emulated computer is made entirely from software. (And you will remember if you did that. You really will.) If you don't know whether you have a 32-bit or 64-bit version of Windows, follow these instructions from Microsoft, or use the Windows Control Panel ( Help! These, Windows XP will not allow to run at all. In order to run these you will have to find a computer with an older operating system or a good emulator or virtual computer (see below). If this doesn't work, then try checking the "Run the program as an administrator" box 3). This defeats the security in Windows Vista however and should be a last resort. If you are concerned with running older DOS programs you may need an emulator. You can find it at its Sourceforge home. t/ If these suggestions don't work for you, you are back to finding a computer with an older operating system. Windows Vista Windows Vista uses a similar technique for running older programs. Open an Explorer window and navigate to the.EXE file for the program. Then. Right click on the program file (the.EXE or.COM file). Select Properties from the menu that pops up 1). Select the Compatibility Tab in the dialog. Change the options so the program opens in Windows 95 or 98 compatibility mode. Note the other options in the dialog as you may have to experiment a bit and change some of them as well 2). ( Note: If you really want instructions for setting up this method for use with WPDOS, I may be able to supply them, but only if you are willing to pay an outrageously and unreasonably high consultation fee.) Advantages: Free download (and a free download. 35 answers Last reply Mar 5, 2010 More about compatibility. Ask a new question DOS Compatibility Windows XP. Product. See the description of these methods for details. If you use WPDOS, I firmly believe that you should, if possible, run 32-bit Windows instead of any 64-bit version of Windows. Basic concepts You must understand the following concepts before you begin: 64-bit versions of Windows.