Unable to Log In After Patch

Updated: 5 months ago
Article ID: 21687
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Common Problems

Everytime I try to log in it says i have been disconnected (BLZ51901021)

When I go to log in my password and user name is accepted, and a bubble pops up saying Connecting, but it never connects, it gave me an error code of BLZ51900001

f you experience problems with World of Warcraft after patching, first check the Realm Status page to see if your realm is currently online. If your realm is online, try the following:

  1. Reset your user interface to make sure your files and addons are not corrupted.
  2. Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
  3. Configure firewall and proxy settings for World of Warcraft.
  4. Restart your computer.

Tried everything here?

If you have tried these steps and still require assistance, please visit our Technical Support Forums or contact us.