Unhandled Exception: (c0000005) - KPndaD2/SlashDSetup GitHub Wiki

Click on your Start Button and type in "System" and click on it.
Next, Click on "Advanced System Properties"
Go to the "Advanced" Tab and under the Performance Section Click on "Settings"
Now go to the "Data Execution Prevention" Tab
Choose the option to "Turn on DEP for all programs and services except those I select."
Add your Diablo II.exe to the list as well as the game.exe from the Diablo II Directory/Folder
You must Click "Apply" and then "OK"