Fix error WOW51900309 in Windows 10

When you are trying to run World of Warcraft on your Windows 10 PC, sometimes you may encounter the error code WOW51900309 and this usually happens when you run Classic mode beta in the game. It also happens when your computer has any kind of network issues and other good reasons. If you are also facing the same problem on your computer, this guide will help you fix WOW error 51900309 with effective troubleshooting hacks.

How to fix error WOW51900309 in Windows 10

There are so many reasons associated with WOW error code 51900309 on your Windows 10 PC. However, a few important reasons are listed below.

  • does not have admin rights.
  • Corrupted data in the game installation folder.
  • No editing rights.
  • The antivirus program is blocking some features of the game or the game itself.
  • Windows Defender Firewall is blocking the program.
  • Outdated operating system and PC drivers.
  • Corrupted game data.

Now move on to the next section to learn about the troubleshooting methods for World of Warcraft 51900309. Read and apply the methods discussed below on your Windows 10 PC to fix WOW error code 51900309 and prevent it from happening.

Method 1: Basic Troubleshooting Methods

Follow these basic troubleshooting methods to resolve the reported issue.

1A. Restart your computer

A common trick to resolve all World of Warcraft related intermittent glitches is to restart your computer. You can restart your computer by doing the following.

1. Go to the Windows Power User menu by pressing the Windows and X keys at the same time.

2. Select Shut down or sign out.

3. Finally, click "Restart".

After restarting the game, check if you can play without errors.

1B. Check game requirements

If you encounter WOW error 51900309 at launch, you need to check the basic requirements of the game and make sure your PC meets them.

Minimum requirements:

  • CP: Intel Core i5-760 or AMD FX-8100 or newer
  • CPU SPEED: Information
  • RAM: 4 GB RAM (8 GB for integrated graphics such as Intel HD Graphics)
  • OS: Windows 7/Windows 8/Windows 10 64 bit
  • VIDEO CARD: NVIDIA GeForce GTX 560 2GB or AMD Radeon HD 7850 2GB or Intel HD Graphics 530 (45W)

Recommended requirements:

  • CPU: Intel Core i7-4770 or AMD FX-8310 or higher
  • CPU SPEED: Information
  • RAM: 8 GB
  • OS: Windows 10 64 bit
  • VIDEO CARD: NVIDIA GeForce GTX 960 or AMD Radeon R9 280 or higher

1C. Make sure your network connection is correct

An unstable internet connection results in error WOW51900309. Also, if there are any obstructions between your router and your computer, they can interfere with your wireless signal and cause intermittent connection problems.

You can run a Speed ​​Test to know the optimal network speed level required for a proper connection.

Make sure your device meets the criteria below.

  • Find your network signal strength and remove any obstacles in the way if it is very low.
  • Avoid having too many devices connected to the same network.
  • Always buy a modem/router that is verified by your Internet Service Provider (ISP) and they do not conflict.
  • Do not use old, broken or damaged cables. Replace cables if necessary.
  • Make sure the wires from the modem to the router and from the modem to the wall are stable and free from interference.

If there are any internet connection issues, check out our Fix Network Connection Issues in Windows 10 guide to fix them.

1D. Close background tasks

Several users have confirmed that WOW error 51900309 can be resolved by closing all background tasks running on your PC. To complete a task, follow our guide "How to complete a task in Windows 10" and proceed according to the instructions.

Once you have closed all background processes, check if you managed to fix error code 51900309 in WOW.

1E. Run System File Checker and DISM

If files are missing or corrupted on your Windows 10 PC, you will encounter error WOW51900309. However, you can repair these corrupted files using the built-in utilities, namely System File Checker and Deployment Image Servicing and Management.

Read our guide to restoring system files in Windows 10 and follow the steps to repair any corrupted files.

1 floor Run a full disk cleanup

Few users have suggested that clearing some disk space on their PC helped them deal with WOW error code 51900309. This will allow your PC to install new files when needed, which will help you solve the problem.

If your computer is running low on available space, resulting in the WOW error code discussed, follow our 10 Ways to Free Up Hard Drive Space in Windows guide to help you clean up all the junk files on your computer.

1g Update Windows

You can also fix errors on your computer and in the game by updating your operating system. Always check if you have updated your Windows operating system, and if there are any updates pending, use our guide How to download and install the latest Windows 10 update.

After updating the Windows operating system, check if you can connect to the WOW game server without errors.

1 hour Update your graphics drivers

World of Warcraft, a graphics intensive game, your graphics driver is essential to your gaming experience. If the drivers are outdated or faulty, be sure to update them. You can search for the latest driver releases on its official websites or manually update them.

Follow our 4 Ways to Update Graphics Drivers in Windows 10 guide to update your driver and check if WOW error 51900309 is fixed.

1I. Rollback GPU Drivers

Sometimes the current version of GPU drivers can cause WOW error 51900309, in which case you need to restore previous versions of installed drivers. This process is called driver rollback and you can easily roll back your computer drivers to their previous state by following our guide How to roll back drivers in Windows 10.

1J. Reinstall your graphics drivers

If you are still experiencing WOW51900309 after updating your graphics drivers, please reinstall your device drivers to fix any incompatibility issues. There are several ways to reinstall drivers on your computer. However, you can easily reinstall your graphics drivers by following the instructions in our How to Uninstall and Reinstall Drivers in Windows 10 guide.

After reinstalling your GPU drivers, check if you can access World of Warcraft without errors.

1 to. Clear DNS cache and data

Few users have suggested that clearing the DNS cache and data on your PC helped them fix error code WOW51900309. Follow the instructions.

1. Press the Windows key and type cmd. Then click Open.

2. Now enter the following commands one by one and press the Enter key after each command.

ipconfig/flushdnsipconfig/registerdnsipconfig/releaseipconfig/renewnetsh winsock reset

3. Wait for the commands to complete and restart the PC.

Method 2: Run Blizzard as an administrator

This is one of the most common causes that causes WOW51900309 error to appear on your Windows 10 PC. Some permissions and features can only be accessed if you have granted administrator rights to the World of Warcraft game. In this case, you can fix WOW error code 51900309 by following the instructions below.

1. Right-click the World of Warcraft shortcut on your desktop, or navigate to the installation directory and right-click it.

2. Now select the Properties option.

3. Then go to the "Compatibility" tab and check "Run this program as an administrator".

4. Finally, click Apply > OK to save the changes.

Method 3: Rename the Cache, Interface and WTF folders

In folders such as Cache, Interface and WTF, there are several game files that are responsible for storing basic information about the game, progress and settings. If they are corrupted, you will encounter WOW error 51900309. Therefore, you are advised to rename the folders and check if that works.

1. Close all the processes running in the background as mentioned in the above method and press the Windows + E keys at the same time to open File Explorer.

2. Now navigate to the specified path as shown in the picture.

C:Program Files (x86)World of Warcraft

3. Now find the following folders and right click on them. Then select "Rename" as shown.

4. Now rename the folders to something like Cacheold, Interfaceold, WTFold respectively.

5. Once you have renamed these folders, restart the game and check if you can fix error code 51900309 on Windows 10 PC.

Method 4: Delete WOW Cache Folder

Some users are facing WOW51900309 during startup and this problem can be solved by completely deleting the cache folder from your computer. All temporary files of the game will be deleted and the next time you start the game in succession, it will start without errors. If renaming folders doesn't work for you, the instructions below will help you do it.

1. Go to the World of Warcraft folder.

2. Then right-click on the Cache folder and select the Delete option as shown in the picture.

Then check if you have fixed Wow error 51900309.

Method 5: Change the read-only attribute

World of Warcraft will run without any errors if you provide the correct user attribute settings in UAC (User Account Control). If the game and its components have read-only components, you will not be able to modify or update World of Warcraft. As a result, World of Warcraft 51900309 will appear on your computer. In this case, change the read-only attribute for the game as indicated below.

1. Launch File Explorer and navigate to the World of Warcraft folder.

2. Now, right-click on the Wow.exe installation file and select the Properties option.

3. Now go to the General tab and uncheck the Read Only checkbox next to the Attributes section as shown in the image.

4. Then click Apply > OK to save the changes.

Method 6: Run the Blizzard Repair Tool

If you are still unable to fix WOW51900309, you may have corrupted game files on your computer. Corrupted files can fill up your PC due to the antivirus package being overprotected or due to an update failure. Thankfully, you can automatically resolve all of these corrupted game files using Blizzard's built-in tool. Here are some instructions for running the Repair Tool.

1. As before, navigate to the directory with the Wow.exe installation file and select the "Run as administrator" option, as shown in the figure.

2. If the User Account Control window appears, click Yes to continue.

3. Now go to the "Games" tab in the upper corner of the window and select World of Warcraft from the list.

4. Then click "Options" and then "Scan and Repair" from the drop-down list.

5. At the next prompt, click "Start Scan" and wait for the process to complete.

6. Finally, restart the game and check if you can fix WOW error 51900 309.

Method 7: Change Windows Defender Firewall settings

You will also encounter World of Warcraft 51900309 due to an overly reactive or overprotective antivirus package on your Windows 10 PC. This prevents the connection between the game launcher and the server. So, to fix this problem, you can either whitelist World of Warcraft in your firewall settings or disable the problem temporarily.

Option I: World of Warcraft Whitelist

To allow World of Warcraft in Windows Defender Firewall, follow our guide Allow or block apps through Windows Firewall and follow the steps as instructed.

Option II: Turn off the firewall (not recommended)

If you don't know how to turn off Windows Defender Firewall, our How To Turn Off Windows 10 Firewall guide will help you fix error WOW51900309.

Option III: Create a New Rule in the Firewall

1. Press the Windows key and type Windows Defender Firewall with Advanced Security. Then click Open.

2. Now in the left pane, click Inbound Rules as shown in the figure.

3. Then, in the right pane, click New Rule… as shown.

4. Now make sure you have selected the "Program" option under "What type of rule do you want to create?". menu and click "Next>" as shown in the figure.

5. Then click the "Browse..." button corresponding to the Path to this program: as shown.

6. Then go to C:Program Files (x86)World of Warcraft and double click on the installation file. Then click on the Open button.

7. Then click Next > in the New Inbound Rule Wizard window as shown in the figure.

8. Now select the radio button next to Allow the connection and click Next > as shown.

9. Make sure the Domain, Private, Public fields are selected and click Next > as shown.

10. Finally, add a name to the new rule and click Finish.

Done! Check if you have WOW error code 51900309 fixed or not.

Method 8: Temporarily disable your antivirus (if applicable)

Some incompatible antivirus programs installed on your computer can cause WOW error 51900309. To avoid conflicts, you should verify the security settings of your Windows 10 computer and check if they are stable or not. To find out if the antivirus package is causing the WOW error code 51900309, disable it once and try connecting to the network.

Read our guide on how to temporarily disable your antivirus in Windows 10 and follow the instructions to temporarily disable your antivirus program on your PC.

If you have a fix for error WOW51900309 after disabling the antivirus program on your computer, you are advised to completely uninstall the program from your PC.

Read our guide on Force Removal of Programs That Won't Remove in Windows 10 to remove an antivirus program from your computer.

Method 9: Reinstall World of Warcraft

Any misconfigured files in World of Warcraft will result in error WOW51900309, even if you've followed all the methods above and updated any pending actions. So in this case, you have no other choice but to reinstall the game. Here's how you do it.

1. Press the Windows key and type apps and features, then click Open.

2. Now find World of Warcraft in the list and click on it. Then select the "Delete" option.

3. When prompted, click Remove again.

4. Now visit the Blizzard Official Site and click World of Warcraft.

5. Then click "Download for Windows" and wait until the game is installed on your computer.

6. Navigate to My Downloads in File Explorer and double click on the setup file to launch the application.

7. Follow the on-screen instructions to install the game on your Windows 10 PC.

Finally, restart the game and you will now have the WOW error code 51900309 fixed.


We hope this guide was helpful and you were able to fix WOW51900309 on your system. Let us know which method worked best for you. Also, if you have any questions/suggestions regarding this article, feel free to post them in the comments section.

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