Windows® will occasionally force programs to use all processor cores to make them run faster, which can cause performance problems with some of our games. Select your product and follow the steps to resolve the issue.

Heroes of the Storm

  1. While the game is running, press Ctrl + Shift + Esc on your keyboard to open the Task Manager.
  2. Click the Processes tab (Details tab on Windows® 10).
  3. Right-click the HeroesOfTheStorm.exe process, or the HeroesOfTheStorm_x64.exe process, and select Set Affinity.
  4. Uncheck one of the cores and click OK.

StarCraft II

  1. While the game is running, press Ctrl + Shift + Esc on your keyboard to open the Task Manager.
  2. Click the Processes tab (Details tab on Windows® 10).
  3. Right-click the SC2.exe process and select Set Affinity.
  4. Uncheck one of the cores and click OK.