How to fix error error-autodataseg-exceeds-64k in Windows 11

Solution Steps

1. 1 First, identify the exact program that triggers the error. Right-click the executable file (usually a .exe or .com file) and select 'Properties'. Look at the 'Compatibility' tab to see if there are any settings already applied. This helps you understand what the program expects.
2. 2 If the program is a 16-bit application, Windows 11 cannot run it directly because it lacks the 16-bit subsystem. Instead, you'll need to use a DOS emulator like DOSBox. Download DOSBox from the official website (https://www.dosbox.com) and install it by running the installer and following the prompts.
3. 3 Once DOSBox is installed, open it. You'll see a command prompt window that looks like a DOS screen. You need to mount the folder containing your program as a drive. For example, if your program is in C:\OldGames, type 'mount c c:\oldgames' (without quotes) and press Enter. This makes the folder accessible as the C: drive inside DOSBox.
4. 4 Change to the mounted drive by typing 'c:' and pressing Enter. Then navigate to the folder where your program is located using 'cd' commands. For instance, if your program is in a subfolder called 'game', type 'cd game' and press Enter.
5. 5 Now run the program by typing its filename (e.g., 'game.exe') and pressing Enter. DOSBox will emulate the old environment, and the error should not appear because the memory constraints are handled differently. If the program still fails, you may need to adjust DOSBox's memory settings in its configuration file (dosbox.conf) by increasing the 'memsize' value to 64 or higher.
6. 6 If you prefer not to use DOSBox, you can try using a virtual machine with an older Windows version, but that's more complex. For most users, DOSBox is the simplest and most reliable solution.