Fix World of Warcraft Error 51900101 on Windows 10

Since its release, World of Warcraft has been the talk of the town, and it certainly remains a standout in other popular streaming games. However, like all games and apps, World of Warcraft is also not without bugs. It has its downsides and one of the most commonly encountered issues is the WOW error 51900101. This causes the game to randomly shut down and you have to start from the beginning. This issue is also related to game crash issues. If you are unable to resolve this issue on your Windows 10 PC, this guide will help you fix it. All the methods mentioned in this guide will help you achieve a stable connection to the game without any drawbacks. So keep reading!

How to Fix World of Warcraft Error 51900101 on Windows 10

There are so many reasons related to World of Warcraft 51900101 on your Windows 10 PC. However, a few important reasons are listed below.

  • Battle.net 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 WOW error WOW 51900101. Read and apply the methods discussed below on your Windows 10 PC to fix WOW error 51900101 and prevent it from occurring.

Basic Troubleshooting Methods

1. 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 access the game without any errors.

2. Check the game requirements

If you encounter WOW 51900101 issue on launch, you need to check the basic requirements of the game and make sure your PC meets them.

  • OS: Windows 7 64-bit.
  • Processor: Intel Core i5-760, AMD FX-8100.
  • GPU: NVIDIA GeForce GTX 560 2GB, AMD Radeon HD 7850 2GB, or Intel HD Graphics 530 (45W TDP with 8GB RAM).
  • RAM: 4 GB RAM (8 GB for integrated graphics such as the Intel HD Graphics series).
  • Storage: 70 GB of free space on a 7200 rpm hard drive.

3. Ensure the correct network connection

An unstable internet connection results in the WOW 51900101 error, and 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 Speedtest to find out the optimal network speed level required for a proper connection.

Make sure your device meets the criteria below.

  • Find your network's signal strength and, if it's very low, remove any obstacles in the way.
  • 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.

4. Restart 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 pending updates, 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.

5. 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 51900101 is fixed.

6. Roll Back GPU Driver Updates

Sometimes the current version of the GPU drivers can cause the WOW 51900101 error, in which case you need to restore the previous versions of the 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.

7. Reinstall your graphics drivers

If you are still experiencing World of Warcraft 51900101 after updating your graphics drivers, please reinstall your device drivers to fix the 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.

8. Temporarily disable your antivirus (if applicable)

Some incompatible antivirus programs installed on your computer will cause WOW error 51900101. 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 5190010, 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 solution to your problem after disabling the antivirus program on your computer, then 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 1: Run WoW as administrator

This is one of the most common reasons causing WOW error 51900101 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 51900101 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 Properties.

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 2: Close background tasks

Several users have confirmed that WOW error 51900101 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 5190010 in WOW.

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 the WOW error code 5190010. 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 go to the next location 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 5190010 on Windows 10 PC.

Method 4: Delete WOW Cache Folder

Several users are facing WOW error 51900101 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. Navigate to the World of Warcraft folder as described in Method 3 above.

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

Check if you have fixed World of Warcraft error 51900101.

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. This results in WOW 51900101 on your PC. In this case, change the read-only attribute for the game as mentioned below.

1. Launch File Explorer and open the World of Warcraft folder.

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

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: Repair System Files

If you have missing or corrupted files on your Windows 10 PC, you will encounter WOW error 51900101. However, you 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.

Once the scan is complete, one of the following messages will appear:

  • Windows Resource Protection found no integrity violations.
  • Windows Resource Protection was unable to perform the requested operation.
  • Windows Resource Protection found corrupted files and successfully repaired them.
  • Windows Resource Protection found corrupted files but was unable to fix some of them.

Wait for the message that verification is 100% complete and see if your computer is able to fix WOW error code 5190010.

Method 7: Run a Full Disk Cleanup

Few users have suggested that clearing some disk space on their PC helped them deal with the WOW error code 5190010. 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 guide to using Disk Cleanup in Windows 10, which will help you remove all junk files on your computer.

Method 8: Run the Blizzard Repair Tool

If you are still unable to fix WOW error 51900101, there is a chance that you have corrupted game files on your computer. Corrupted files can fill up your PC due to overprotection of an antivirus package 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 Battle.net 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 51900101.

Method 9: Change Windows Defender Firewall settings

You will also encounter WOW 51900101 due to an overly reactive or overly protective 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 with that.

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 in the figure.

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 navigate to the path C:Program Files (x86) World of Warcraft and double click 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 in the image.

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 your WOW error code 5190010 is fixed or not.

Method 10: Reinstall World of Warcraft

Any misconfigured files in World of Warcraft will result in WOW 51900101, 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 & Features. Then click Open.

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

3. When prompted, click Remove again.

4. Then visit the official Blizzard website to download World of Warcraft for Windows PC.

5. Then click "Download for Windows" and wait while 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.

8. Finally, restart the game and now you will have the WOW error code 5190010 fixed.

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We hope this guide was helpful and you were able to fix WOW error 51900101 on Windows 10. 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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