Forum Discussion
How does Windows continue supporting programs written decades ago?
I'm curious about how Windows manages to support programs written many decades ago, allowing them to run smoothly on modern systems. I want to understand the technologies or compatibility features that enable old software to function without issues on current Windows versions.
3 Replies
Find the icon or the folder containing the program you want to run.
You can right-click a program's .exe file, go to Properties > Compatibility, and check the box to "Run this program in compatibility mode for:" . You can then select an older version of Windows (like Windows 7 or even Windows 98) that the program was designed for . This manually tells the system to apply the relevant compatibility fixes.
When a 32-bit program tries to write to the system-wide registry key HKLM\Software.
