Fix: “The Application Encountered an Unexpected Error” in Blizzard

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Blizzard, a subsidiary of Activation Blizzard, is a Californian company that develops and publishes video games. Blizzard’s desktop application has many bugs that prevent you from playing games published by Blizzard. One of these errors is the error message “The Application Encountered an Unexpected Error”. This error may occur if you try to connect to the application.

The error message is often due to a faulty installation or application cache files. The cache is a temporary file that is stored on your system and contains information that you can access through your sessions. This error message is generic and can be solved by a simple solution, which we will mention below. But before getting to the heart of the matter, let’s take a closer look at the causes of the error message.

To fix the Blizzard error “The Application Encountered an Unexpected Error”:

Update Device Drivers

Unexpected errors can be caused by outdated software, software that conflicts with the game client or corrupted game data.

Update your drivers and operating system to resolve compatibility issues.

January 2021 Update:

We now recommend using this tool for your error. Additionally, this tool fixes common computer errors, protects you against file loss, malware, hardware failures and optimizes your PC for maximum performance. You can fix your PC problems quickly and prevent others from happening with this software:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.


Obsolete drivers and operating systems can cause a variety of problems and are one of the first things to be checked when a game has problems. The following instructions will help you check and update your drivers.

  • Even new computers can have obsolete drivers and operating systems because updates are published regularly.
  • Some games and programs may work well on a system with old drivers, but obsolete drivers may still cause technical problems with some games or programs.

Delete the Tools folder

Here’s how to do it:

1. Restart your computer.
2. make sure that the option to display hidden files and folders is enabled.

3. for Windows Vista and 7: click on Start and select Computer.

-Windows XP : Click Start and select My Computer.
-Windows 8: Windows + Q key and select Computer.

For Windows Vista and 7: Double-click drive C, double-click the ProgramData folder, then delete the folder.

Windows XP: Double-click on drive C, then Documents and Settings, then All Users, then Application Data, then delete the folder.
Window 8: Double-click drive C, double-click the ProgramData folder, then delete the folder.

Note: The above steps can make forget about the game installation locations. If your games are not found, you will see Install on the tab instead of Playing. To find your installation, click on Locate this game or launch the game launcher.

Closing of background applications

Third-party programs running in the background may interfere with our games. To temporarily disable these programs and eliminate them as the cause of the problem, follow these steps.

Before following these steps, close any unnecessary programs and restart your computer.

Identify the elements that are problematic at start-up:

  1. Press Ctrl+Shift+Esc to open the Task Manager.
  2. Click on More details.
  3. Select the Start tab.
  4. Right-click on each item and select Disable.
  5. Restart the computer.
  6. If this solves the problem, activate the startup application one by one to determine the cause of the problem. You must restart between each application you activate.

Do a Clean Install of the Blizzard App

Since the problem is related to corrupted cache files or an obsolete application installation, the only way to solve the problem is to reinstall the Blizzard application. This includes manually deleting cache files, downloading and installing the application.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance