An unexpected error occurred while trying to install or update. Please try again or contact Customer Support.​
Error Codes: BLZAPPAGT02600, BLZBNTAGT02600, BLZBNTAGT00000A28

An unknown variable has prevented the game from installing or updating and may show a specific error message relating to what went wrong. Try the steps below to resolve this issue.

Note: If you recieve a file is corrupted error, follow the steps in our File Appears to be Corrupt article.

Windows

  1. Update Windows. If your operating system is out of date, Battle.net may not work
  2. Try closing background applications. Programs running in the background can conflict with Battle.net.
  3. Delete the Battle.net Tools folder. This can resolve issues caused by corrupted Battle.net folders.
  4. Disable or temporarily uninstall any security programs. Security software may interfere with Battle.net and prevent it from running properly.
  5. Run Battle.net in Administrator Mode to address any installation errors.
Advanced Troubleshooting
  1. Run a security scan to find and resolve any infections. Malicious programs can interfere with installations and updates.
  2. Make sure Secondary Logon is enabled. Windows Secondary Logon service must be enabled for Battle.net to install and run.
  3. Run Check disk and defragment your hard drive to resolve file system or hard drive issues that may cause the game to crash.
  4. Run the Memory Diagnostic Tool. Errors in your computer’s physical memory can cause the installer to fail.
  5. If you're using wireless internet, try switching to an optimized wired connection.

Mac

  1. Run an OS Software Update. If your operating system is out of date, Battle.net may not work.
  2. Try closing background applications. Programs running in the background can conflict with Battle.net.
  3. Delete the Battle.net Tools folder. You may experience errors when Battle.net Update Agent files are missing or corrupt.
  4. Disable or temporarily uninstall any security programs. Security software may interfere with Battle.net and prevent it from running properly.
Advanced Troubleshooting
  1. Repair your disk permissions and reset game folder permissions. Changes to your Mac's permissions may prevent Battle.net from running properly.
  2. Run Repair Disk to resolve any corrupted hard drive sectors.
  3. Run the Apple Hardware Test. Errors in your computer’s physical memory can cause the installer to fail.
  4. Check for FileVault. FileVault/FileVault 2 enabled Macs are not supported and may cause this error. For assistance with FileVault, please contact Apple.
  5. If you're using wireless internet, try switching to an optimized wired connection.

Tried everything here?

If you tried all the steps for your operating system and still need assistance, please visit our Battle.net Technical Support Forums or contact us and provide the above error(s).