

There were problems converting 16-bit (DOS stuff) to the 32-bit memory addressing scheme in Vista and XP (and the 64-bit versions of all Windows systems). It turns out that Vista and XP didn't handle the DOS programs and their memory needs very well. Note that if you use a 32-bit operating system, you have to make sure you are using the 32-bit versions of any Windows programs you're using (not the 64-bit versions). The good news is that Windows 7, Windows 8 and Windows 10 32-bit (not 64-bit) have changed that! Windows 11 is 64-bit only and will likely not run DOS programs well. When Vista and XP came out many of the DOS programs that ran fine under W95/98 wouldn't run at all on those operating systems. There are many Windows 95/98 and even 3.1 computers out there running these special apps today.

Otherwise, the software works just fine, and spending a lot of money to replace it seems crazy. There's a lot of older telecom and other software out there that is very specialized, not upgradeable, not replaceable, and won't run on modern Windows operating systems like Windows 7, Windows 8, Windows 10 or Windows 11. How to Run DOS Programs on Windows 7/8/10 and Other Windows Tips
