The Warcraft III patch v1.20b has been released to address a crash exploit.
For the easiest patching process it is recommended that you connect to Battle.net. This can be done by starting the game and clicking on the Battle.net button.
If you have The Frozen Throne expansion installed you only need to download and install The Frozen Throne patch.
Note: If you have any problems while patching, please refer to our support site steps for help.