Known WoW Classic Technical Support Issues [Updated - Jan 6th, 2023]

Well met, adventurers!

We’ll be using this forum thread to track known technical support issues, like conflicts which cause performance errors, crashes, and connection problems in WoW Classic. Check out the list below, and give these steps a try before creating a new topic! Additionally, more bug-related issues can be found in the Classic Bug Report Forum’s most recent Known Issues thread..





If these resources do not help with your technical issue, check our technical troubleshooting sticky for more help.

Game crashes in Fullscreen mode on older AMD graphics cards

There is a known issue where certain supported graphics cards may crash while in fullscreen mode. To fix the problem, you can launch the game in windowed mode:

  1. Open the Blizzard Desktop App and select the WoW tab
  2. Click Options and select Game Settings from the dropdown menu
  3. In Game Settings, activate the option Additional command line arguments. Type in the following:
  4. Retest the game.

“Unable to Start up 3D Acceleration” with third party overlays running

Some players are experiencing crashes while changing graphics settings in game. Based on our investigations, these appear to be caused by background programs with overlays. Please try disabling any background applications if you are having this issue, especially any which draw an overlay on top of the game client.

World of WarCraft Not Updating with Error BLZBNTAGT00000840
This is a known issue that can occur when a patch is pushed. The following steps will workaround the issue:

  • Press CTRL+SHIFT+ESC, and locate the WoWVoiceProxy.exe or World of WarCraft Voice Proxy process then End Task.
  • Restart the PC.

If the error persists, please try the steps on our support article.

The IPv6 Setting Does not Currently Work

We’re aware of issues with the IPv6 setting on the game client not functioning correctly. The Quality Assurance team is investigating this bug and looking for a resolution.

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Audio Crackling or Sound Distorted

We are currently investigating distorted sounds from Death Knight characters which may cause audio crackling in WoW Classic. This includes when playing the class or simply being around a Death Knight. A possible workaround until this issue can be resolved is disabling the DSP Effects. When in-game, please type the following command in chat:

/console Sound_EnableDSPEffects 0