Fixing the folder’s permissions, running Battle.net as an administrator, or temporarily disabling antivirus protection can often solve this issue. Now that you know the main causes, let’s try the solutions one at a time to troubleshoot the error.
1. Run the Game as Administrator
As mentioned, this error often appears because you are not logged in as an administrator. Running your game with admin rights helps prevent interference from other applications and ensures the game can access all necessary files. Restart your computer and try launching the game again to see if the issue is resolved.
2. Update the Game
Blizzard regularly releases updates to fix known bugs and errors. Making sure your game is up-to-date is essential.
3. Repair the Game
Corrupted or missing game files could also trigger this error. Luckily, the Battle.net client makes it easy to scan and repair files automatically: After the repair, restart the game and check if the BLZBNTAGT0000084B error is gone.
4. Delete the Battle.net Tools Folder
Some users found that deleting the Battle.net Tools folder helps resolve this error. Now, launch the game and see if the issue has been resolved.
5. Disable Windows Defender and Third-Party Antivirus
Security software can occasionally block the game’s access to certain files or folders. Try disabling Windows Defender or any third-party antivirus programs you have installed.
5.1. Windows Defender
5.2. Disable Third-Party Antivirus
Restart your computer and see if the Battle.net error BLZBNTAGT0000084B is resolved.
6. Check for Hard Drive Issues
If your hard drive is corrupted or failing, this can also cause the error. Here’s how to check for hard drive problems:
6.1. Run ScanDisk
6.2. Perform Disk Defragmentation
Note: Don’t use disk defrag on a Solid-State Drive (SSD).
7. Perform a Clean Boot
Performing a clean boot will temporarily turn off unnecessary startup programs that could be interfering with your game. After your PC restarts, try launching the game again.
