Game File Optimization

Keywords:
Reconfiguring game files: Your computer performance may suffer while we optimize your game files. This process takes 15-60 minutes. You can pause this process and complete it later but it must be done before you can play again.

What is optimization?

Optimization is the process consolidating data and removing unnecessary files. This occurs when game data needs to be compressed or when background downloaded patch data needs to be installed. Optimization requires additional hard drive space at first to unpack data prior to consolidation. This process is solid state drive friendly.

Note: If you don't have enough hard drive space to complete optimization, we recommend that you either free some room by removing other data, or that you uninstall the game and reinstall from our newest installer files. That way, the game is already optimized.

Troubleshooting

If you experience issues with the patch optimization process, such as the progress bar moving slowly or being stuck at 0%, it may be a display issue. Allow at least one hour for the optimization to finish. We recommend checking for HDD activity before following the below troubleshooting steps:

Windows

  1. You may experience issues when Blizzard Update Agent files are missing or corrupt. Delete the Battle.net Tools folder to have the Update Agent automatically recreate the necessary files.
  2. The way the Blizzard Update Agent installs and updates our games may cause security software to incorrectly profile the game launcher. Try disabling or temporarily uninstalling your security software.
  3. Be sure to disable read-only settings on any game and launcher executable files (files that end in .exe) in your game folder.
  4. If you are using a public network (like a university or hotel) and you continue to experience issues, contact the system administrator.
  5. If you still have issues during optimization, uninstall the game (in the Battle.net Desktop app, select the game you wish to uninstall, select Options, select Uninstall Game, then click Yes, Uninstall). Then, reinstall the game client.

Mac

  1. Make sure that you run the launcher as an administrator so that it has the permissions needed to update the game.
  2. You may experience issues when Blizzard Update Agent files are missing or corrupt. Delete the Battle.net Tools folder to have the Update Agent automatically recreate the necessary files.
  3. The way the Blizzard Update Agent installs and updates our games may cause security software to incorrectly profile the game launcher. Try disabling or temporarily uninstalling your security software.
  4. Make sure that there is only one instance of the game launcher running at a time. If you are running the older launcher concurrently with the newer one, close it and then let the optimization complete.
  5. If you are using a public network (like a university or hotel) and you continue to experience issues, contact the system administrator.
  6. If you still have issues during optimization, uninstall the game (in the Battle.net Desktop app, select the game you wish to uninstall, select Options, select Uninstall Game, then click Yes, Uninstall). Then, reinstall the game client.

Tried everything here?

If you have tried all of the steps for your operating system and still require assistance, please visit our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) or contact us.

Get Help

Still can't find a solution? Submit a ticket and someone will help out!