There are some old DOS applications that you just can't afford to lose (or games you still like), and Windows 10 lets you keep them. Here's how.

vDos is a DOS emulator designed to run old DOS programs on modern Windows operating systems, particularly useful for 64-bit versions where the built-in NTVDM (NT Virtual DOS Machine) is not ...

Some DOS programs will not work in any current version of Windows. Generally, these are utilities that work close to the hardware, such as defraggers and diagnostic tools.