BLZBNTBTS0000005C Error

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Hi,

Hi everyone,

I’m reaching out here after completely exhausting all known troubleshooting options for the BLZBNTBTS0000005C error. This issue appears when launching Battle.net – specifically, the Update Agent fails to start.

Here’s a list of everything I’ve already tried (multiple times):

  • :white_check_mark: Restarted PC
  • :white_check_mark: Deleted Battle.net folders from ProgramData, AppData\Local, and AppData\Roaming
  • :white_check_mark: Closed all running Blizzard processes in Task Manager
  • :white_check_mark: Reinstalled Battle.net app
  • :white_check_mark: Reinstalled all Blizzard games
  • :white_check_mark: Tried creating a new admin account and installing from there
  • :white_check_mark: Whitelisted the app in my antivirus
  • :white_check_mark: Used Revo Uninstaller to remove all Battle.net traces before reinstalling
  • :white_check_mark: Followed all official support steps from:
    • BLZBNTBTS0000005C Support Page
    • Deleting Battle.net Files
  • :white_check_mark: Scoured Reddit, YouTube, and other forum threads for any workaround

Yet the issue persists. The installation either fails to progress or ends up looping the same error message on launch.

At this point, I’m out of ideas and would truly appreciate any advanced-level fix, internal support escalation, or developer-level insight. I’m really hoping to get back to my games without a full system reset.

Thanks in advance to anyone who might be able to help.

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