Error codes

0xc0000409

Stack buffer overrun

What it means

A program crashed because it wrote past one of its memory buffers. Windows stopped it on purpose.

Common causes

• A bug in the app or game
• Mods, overlays and injectors
• Unstable overclock

How to fix it

1. Update the game or app and remove mods.
2. Close overlays (Discord, Steam, RivaTuner) and test.
3. Undo any overclock or undervolt, including XMP/EXPO memory profiles, and test at stock settings for a day.