We can't connect you to the Battle.net patch service. Please check your internet connection and try again.
Errors: BLZBNTBTS00000028, BLZBNTBTS00002

This error occurs when your connection to our servers is blocked. This may be caused by a third-party program. Follow the steps below to resolve the issue.

  1. Our games require an up-to-date operating system to run properly. Run Software Update to be sure you're using the most recent version.
  2. An outdated installation of Adobe Flash may cause updating errors. Update Flash.
  3. Programs running in the background can interfere with the game. Close any running background applications.
  4. Security software may interfere with the Battle.net Update Agent. Disable or temporarily uninstall any security programs.
  5. Some advanced internet settings may prevent the Update Agent from connecting to our servers. Check your Proxy and Work Offline settings.
Advanced Troubleshooting
  1. If you're using wireless internet, try switching to an optimized wired connection.
  2. Check your network configuration to find any issues with your firewall, router, or port settings.
  3. Some networks require 802.1X authentication, which can prevent Blizzard games from connecting. Check for and disconnect 802.1X.

Tried everything here?

If you have tried all of the steps for your operating system and still require assistance, visit our Technical Support Forum or contact us.