The Blizzard Battle.net Desktop Application requires access to Windows Management Instrumentation to work correctly. If this has become corrupted or disabled, you can follow the steps below to reset it:

  1. Press Windows+Q and type this into the search bar that pops up:
    • cmd
  2. Right-click on Command Prompt and select Run as Administrator
  3. Enter the following commands into the command prompt window one at a time. Press Enter after each command. Any time you get a confirmation prompt, confirm the prompt. One of the commands may also tell you the WMI service is already started. This is okay.
    • net stop winmgmt
    • winmgmt /resetrepository
    • net start winmgmt
  4. Now, exit the command prompt and restart your computer, then retest running the Battle.net application.