If your game crashes with errors that reference a file-read failure (as below), your game files may be corrupt. 

Assertion Failed!
Error Code:  0x85100086
Assertion: Failed to read file from local.
ERROR #134 (0x85100086) Fatal condition!

Failed to read file from local.
  1. Run the repair tool to resolve issues with damaged game files.
  2. In some instances, outdated video, motherboard and sound card drivers may cause the game to crash. Update your drivers
Advanced Troubleshooting
  1. Bad or failing memory may cause the game to fail to read files properly. Run the Memory Diagnostic Tool to detect any memory issues. 
  2. Run a ScanDisk and Defrag to resolve any any file system or hard drive issues that may cause the game to crash.
  3. If the issue persists, uninstall the game and download a new copy of the installer from the Battle.net Game Downloads page.

Tried everything here?

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