Follow these steps to resolve any compatibility issues you may experience.

  1. Run Diablo II in administrator mode.
  2. Make sure the game is patched to the latest version.
  3. If you're using Windows, run Diablo II in compatibility mode.
    1. Right-click the Diablo II icon and click Properties.
    2. Click the Compatibility tab.
    3. Check Run this program in compatibility mode.
    4. Select Windows XP (Service Pack 2) from the dropdown.
    5. Windows Vista / Windows 7 only: make sure Disable desktop composition and Run this program as an administrator are checked.
    6. Click OK.

If the above steps don't work, try running the game in windowed mode:

  1. Right-click the Diablo II icon and click Properties.
  2. Click the Shortcut tab.
  3. Add -w to the end of the Target. For example: "C:\DiabloII\Diablo II.exe" -w