Problem: The game crashes after trying to use custom chat or Optic.
Solution: Your operating system likely needs to be updated. Download the most up-to-date version of DirectX9 from here.
Problem: You receive an error warning about missing DLL followed by “Unable to load HAC! Error 126″.
Problem: You receive an error that states, “Unable to load HAC! Error 126″.
Solution: Your antivirus software is likely preventing HAC from loading. Add loader.dll to your whitelist or temporarily disable your antivirus protection before you load Halo. If required, please consult the manual for your antivirus software for the specifics on how to do this.
Problem: After minimising Halo and returning, the screen may go black for a brief period and the game crashes shortly after.
Solution: This is usually caused by other mods. If you encounter this problem and you’re not using other mods, please post the details on the forum as a bug report.