Failed to open a required file. Please check your internet connection and try again.
Errors: BLZBNTBTS00000035, BLZBNTBTS00000047, BLZBNTBTS00000049, BLZBNTBTS0000004E, BLZBNTBTS0000F, BLZBNTBTS00000050

One or more of your game files are corrupted and can’t be opened. Follow the steps below to troubleshoot the issue.

  1. If you receive this error while installing from a disc, remove the disc and download the game client instead.
  2. If you're using wireless internet, try switching to an optimized wired connection.
  3. Security software may prevent the Update Agent from running properly. Disable or temporarily uninstall security programs.
Advanced Troubleshooting
  1. Programs running in the background can conflict with the Update Agent. Try closing background applications.
  2. You may experience errors when files are missing or corrupt. Delete the Tools folder to have the Update Agent recreate necessary files.

Tried everything here?

If you have tried the above steps and still need help, please visit our Technical Support Forums (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) (Heroes of the Storm) (Overwatch) or contact us.