If you experience crashes, blue or black screens, performance issues, or your computer locks up while playing, follow the steps below to resolve these issues.

Windows®

  1. Make sure you meet the Diablo® III System Requirements.
  2. Update your video drivers regularly. 
  3. Your settings may be too high. Lower the maximum framerate.
  4. Make sure the Battle.net App states Game is up to date for Diablo III.
  5. If you're playing on a laptop, optimise your power management settings and graphics options for gaming.
  6. Run the repair tool to resolve issues with damaged game files.
  7. Programs running in the background can interfere with the game. Close any running background applications.
Advanced Troubleshooting
  1. Security software may interfere with the Update Agent. Disable or temporarily uninstall any security programs.
  2. Run the game in Administrator Mode to address any installation errors.
  3. The file being read may be corrupt. Run Check disk and defragment your hard drive to try to repair any bad sectors.
  4. Follow the steps on the Preventing Overheating article to resolve any heat issues.
  5. Missing system files may cause issues with Blizzard games. Run the System File Checker to scan for damaged or missing files in Windows.
  6. Many overlay programs can create instabilities in the games they're trying to enhance. A list of overlay programs that may be problematic with Diablo III can be found on our Diablo III Software Incompatibilities page. If you have an overlay program that does not appear on this list, it could potentially cause an issue and should also be checked.
  7. All Diablo III mods, regardless of what they do, are in violation of our Terms of Use and can result in a permanent ban. They can also cause the game to lock up or crash.

Mac®

  1. Make sure you meet the Diablo III System Requirements.
  2. Update your video drivers regularly. 
  3. Make sure the Battle.net App states Game is up to date for Diablo III.
  4. Programs running in the background can conflict with the Update Agent. Try closing background applications.
  5. Your settings may be too high. Lower the maximum framerate.
  6. Run the repair tool to resolve issues with damaged game files.
  7. Repair Disk Permissions and Repair Disk to resolve OS or hard drive issues.
Advanced Troubleshooting
  1. Follow the steps on the Preventing Overheating article to resolve any heat issues.
  2. Some MacBook Pro models have two separate graphics cards, which may require manual setup. Make sure your MacBook Pro is set to higher performance or automatic graphics switching is disabled. (15-inch, late 2008 | 17-inch, early 2009 | 15- and 17-inch, mid-2009 | 15-inch, mid-2010 and later | 17-inch, mid-2010 and later).
  3. Reset Folder & File Permissions to ensure there is no conflict between the latest OS update and your permissions.
  4. Reset the System Management Controller (SMC) to reset the voltage to your graphics card.
  5. The NVRAM stores settings related to your computer's devices and settings, such as your volume, display resolution, and startup disk. Try resetting your NVRAM.
  6. To reinstall drivers and files for the latest OS X build, you can download a Combo Update.
  7. Perform an Apple Hardware Test to rule out any hardware issues.

If the issue persists, uninstall your current copy of the game, then reinstall the game client.

Tried everything here?

If you tried all the steps for your operating system and still need assistance, please visit our Technical Support Forum or contact us.