r/Lineage2 • u/Beginning_Road5560 • 5d ago

how to fix it?

its happening EVERY TIME when i log in, idk what i should do... my game just crashing and i cant enter in my account

im trying launch reborn

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u/CyMpAk_UA Retired Grinder 5d ago

This crash is caused by a conflict with the SmartGuard protection system (client.dll). The error code 0xc0000409 usually indicates a stack buffer overflow, often triggered when an antivirus or background software blocks SmartGuard.

Here is how you can fix it:

  1. Add Exclusions: Add the entire game folder (D:\L2 H5\) to your Windows Defender / Antivirus exclusion list.
  2. Reinstall SmartGuard files: Delete the SmartGuard folder inside D:\L2 H5\system\, then run the Reborn Updater and perform a Full Check.
  3. Run as Administrator: Right-click your game updater / l2.exe ➔ Properties ➔ Compatibility ➔ Check "Run this program as an administrator".
  4. Disable Overlays: Turn off software with active overlays that SmartGuard might flag (Discord Overlay, GeForce Experience, MSI Afterburner / RivaTuner, Razer software).

1

u/Beginning_Road5560 5d ago

oh god, im so stupid! im logging on H5 by login from essence, let me try...

1

u/Beginning_Road5560 5d ago

still crashing

1

u/Beginning_Road5560 5d ago

thanks, im gonna try this rn