Blizzard Unexpected App Error: 5 Ways to Fix It

Explore expert-recommended solutions to get rid of the error

by Tashreef Shareef
Tashreef Shareef
Tashreef Shareef
Windows & Software Expert
Tashreef Shareef is a software developer turned tech writer. He discovered his interest in technology after reading a tech magazine accidentally. Now he writes about everything tech from... read more
Reviewed by Alex Serban
Alex Serban
Alex Serban
Windows Server & Networking Expert
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server... read more
Affiliate Disclosure
  • Blizzard's Battle.Net app allows users to download and play a wide range of games, but it often throws an Unexpected error.
  • This happens due to a corrupt app cache, outdated drivers,  or running an outdated version.
  • To fix things, disable the installed antivirus, run the client as administrator, or clear the app cache, amongst other solutions.
fix unexpected error in Windows
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Blizzard is a popular gaming platform offering gamers a range of exciting titles, with as the client. But its gaming client still isn’t as polished, with many getting the Unexpected error at launch.

The error message reads, The application encountered an unexpected error. Since many users have reported encountering it, we researched and identified the solutions to fix the Unexpected error.

Why does unexpected error appear?

Here are a few reasons you might be getting the error:

  • Running an outdated version of the app: If the app has not been updated in a while, you might come across a range of errors with it.
  • Corrupt cache or game data: A corrupt app cache or issues with the game data can trigger the Battlenet Unexpected error on startup.
  • Outdated drivers: When running outdated drivers in Windows, you are bound to face issues with devices and apps.

How do I fix the Blizzard unexpected error?

Before we start making changes to the PC, here are a few quick solutions you should try:

  • Restart the computer.
  • Run the app as administrator and verify whether the Battlenet network error is resolved.
  • Update the app. Simply connecting to the Internet while launching the gaming client should do it.
  • Check if there are any updates available for Windows and install them.
  • Ensure your PC meets the minimum system requirements for the Blizzard game you are trying to play.
  • Disable the installed antivirus, primarily AVG, and check whether the unexpected error is resolved. If yes, we recommend you switch to the best antivirus to avoid running into such third-party conflicts.

If none work, move to the ones listed next.

1. Disable GPU

  1. Locate the launcher, right-click on it, and choose
  2. Paste the following at the end in the Target field followed by space:--disable-gpudisable gpu to fix unexpected error
  3. Click Apply and then OK to save the changes

2. Clear the app cache

  1. Press Windows + E to open File Explorer, paste the following path in the address bar, and hit Enter:C:\ProgramData\Blizzard Entertainment\\Cachepath
  2. Press Ctrl + A to select all the folders here, and hit the Delete key.delete cache to fix unexpected error
  3. Choose the appropriate response if a confirmation prompt appears.

Once done, check whether the unexpected error goes away. If not, head to the next solution.

3. Disable OneDrive

  1. Press Windows + R to open Run, type regedit in the text field, and hit Enter.registry
  2. Click Yes in the UAC prompt.
  3. Paste the following path in the address bar and hit Enter:Computer\HKEY_CURRENT_USER\Software\Microsoft\OneDrivepath
  4. Right-click on the empty portion, hover the cursor over New, choose DWORD (32-bit) Value, and name it DisableFileSyncNGSC.dword to fix unexpected error
  5. Double-click on the newly created DWORD.DisableFileSyncNGSC
  6. Enter 1 under Value Data, and click OK to save the changes.modify to fix unexpected error
  7. Once done, restart the computer.

If OneDrive is enabled on the PC, certain critical files needed to run may be synced and become unreachable/unreadable, thus resulting in the Unexpected error. So, disable OneDrive on Windows to fix things. In case this doesn’t work, make sure to revert the changes.

4. Update the drivers

  1. Press Windows + X to open the Power User menu, and select Device Manager.device manager
  2. Expand Display adapters, right-click on the graphics adapter, and choose Update driver.update drivers to fix unexpected error
  3. Select Search automatically for drivers from the options that appear and wait for the process to automatically for drivers

Expert tip:


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Updating the graphics driver should help fix the Unexpected error in Windows. Also, some users identified the audio drivers to be responsible, in which case updating the audio drivers should do the trick.

To perform this task, you can opt-in for dedicated software that is capable to manage all drivers and update them in less than 5 minutes.

Hence, you don’t need to second guess and utilize a complete tool like DriverFix and fix various game errors without problems.

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5. Reinstall on the system drive

  1. Press Windows + R to open Run, type appwiz.cpl in the text field, and click OK.appwiz.cpl
  2. Select the app here, and click Uninstall.uninstall to fix unexpected error
  3. Click Yes, Uninstall in the confirmation prompt.yes. uninstall
  4. Now, head to the official website and download the
  5. Run the setup and click Yes in the prompt.
  6. Make sure the installation path listed here is for the system drive, most likely, the C: drive. If it’s not, click on Change, choose the one listed here, and then click on Continue to proceed with the installation.change path to fix unexpected error

Many users reported installing the client on a non-system drive can trigger the Unexpected error. Also, if you run out of storage on the C: drive, you can always move the games to another drive.

That’s all there is to the error, and we hope one of the solutions here should have worked for you. Also, find some quick tips and tricks to optimize Windows for gaming.

For any queries or to share a solution that worked for you, comment below.

Still having issues? Fix them with this tool:


If the advices above haven't solved your issue, your PC may experience deeper Windows problems. We recommend downloading this PC Repair tool (rated Great on to easily address them. After installation, simply click the Start Scan button and then press on Repair All.

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