Minecraft — errors & fixes

Error code 1, launcher issues

• Minecraft crash with exit code -1073740791 (0xC0000409) — This Windows STATUS_STACK_BUFFER_OVERRUN crash is most often caused by outdated or broken GPU drivers — update your graphics drivers directly from NVIDIA/AMD/Intel, then relaunch.
• Minecraft error code 1 (exit code 1) — Exit code 1 is almost always an incompatible mod or the wrong Java version — clear the mods folder, then make sure Java matches your Minecraft release (Java 21 for 1.20.5+).
• Minecraft launcher not opening — Repair or Reset the Minecraft Launcher in Windows Settings → Apps → Minecraft Launcher → Advanced options — the official first-line fix.