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.

Overclocked Video Cards

Video cards modified to run at a higher clock speed, either by the user or the manufacturer, are not supported and may cause issues in StarCraft® II and Heroes of the Storm®. If you want to revert your video card settings, please contact your card's manufacturer for assistance before doing so. Nvidia® graphics card users can use these steps to determine if their card is overclocked.

Note: Factory overclocked cards may use terms like "Superclocked", "Turbo", or "Supercharged".

Windows®

  1. Make sure your computer meets the game's system requirements.
  2. Restart your computer to clear its memory and free system resources that your game needs to run.
  3. Make sure the game is up to date before playing. Updating the game while you’re playing may degrade performance.
  4. The game requires up-to-date drivers to run smoothly. Update your drivers.
  5. Lower your in-game settings to improve performance.
  6. If you're playing on a laptop, optimize your power management settings and graphics options.
Advanced Troubleshooting
  1. Programs running in the background can interfere with the game. Close any running background applications.
  2. Run the repair tool to resolve issues with damaged game files.
  3. Changes to the software settings on your video card drivers may cause crashes. Reset your video driver settings to correct this problem.
  4. Try disabling the in-game reverb setting.
    1. Press Esc to open the in-game menu.
    2. Click Options.
    3. Click Sound.
    4. Uncheck Enable Reverb.
  5. The game file may be corrupt. Run Check disk and defragment your hard drive to try to repair any bad sectors.
  6. Deleting the Battle.net cache folder may resolve issues caused by outdated files.
  7. Windows 10 users may notice performance problems caused by CPU usage. Change your processor affinity to resolve the problem.
  8. Your system components can overheat, causing your system to lock up and become unresponsive. Check for overheating components.
  9. Crashes and lockups may be caused by problems with your computer's physical memory. Run a memory scan to rule out this issue.

Mac®

  1. Make sure that your computer meets the games system requirements.
  2. Restart your computer to clear its memory and free up system resources that your game needs to run.
  3. Make sure that the game is up to date before playing. The game will continue to download while you’re playing, which may degrade performance.
  4. Our games require an up-to-date operating system to run properly. Run Software Update to be sure you're using the most recent version.
  5. In-game settings can have a large impact on game performance. Lower your in-game settings to improve performance.
  6. Reset Folder & File Permissions to make sure there is no conflict between the latest OS update and your permissions.
Advanced Troubleshooting
  1. Programs running in the background can conflict with the Battle.net Update Agent. Try closing background applications.
  2. Run the repair tool to resolve issues with damaged game files.
  3. Overheating can cause your system to lock up and become unresponsive. Follow our overheating prevention guide to avoid this issue.
  4. Try disabling the in-game reverb setting.
    1. Press Esc to open the in-game menu.
    2. Click Options.
    3. Click Sound.
    4. Uncheck Enable Reverb.
  5. If the System Management Controller (SMC) is corrupted, this may degrade performance. Reset the SMC to resolve related issues.
  6. The folder may be saved on a corrupt hard drive sector. Run the Repair Disk utility to resolve hard drive issues.
  7. Perform a Combo Update to resolve performance issues
  8. Run the Apple Hardware Test to make sure that there are no physical problems with your hard drive.
  9. A corrupted cache file can cause issues with Blizzard games. Deleting the Battle.net cache folder may resolve issues caused by outdated files.
  10. 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- and 17-inch, 2008-2009 | 15- and 17-inch, mid-2010 and later).

If the issue persists, uninstall your current copy of the game and reinstall the game from the Diablo III tab in the Battle.net App.

Tried everything here?

If you have tried all of the steps for your operating system and still need help, please visit our Technical Support Forums (StarCraft II) (Heroes of the Storm) or contact us.