How to Fix Error Code 25509 in Modern Warfare 2

Disabling the VPN or proxy may fix the error code 25509

by Madhuparna Roy
Madhuparna Roy
Madhuparna Roy
A diploma holder in computers and with a keen interest in technology, Madhuparna is passionate about writing How-to guides and helping people solve the most intricate Windows issues.... 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
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  • If you encounter the error code 25509 while playing your favorite Modern Warfare 2 game, note that it's a common error that mostly arises due to an issue with the router/modem.
  • The error could show up even when the internet connection may be stable, or even if you have recently updated the game to its latest version. 
  • Sometimes, the error code 25509 may also occur due to an active VON connection or a proxy server that may interfere with the game functioning. 
error code 25509 mw2

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If you are a fan of Modern Warfare 2, you may encounter the error code 25509 while matchmaking. MW2 has been known for glitches and errors due to bug patch updates. However, 25509 is a relatively new error reported by many gamers off-late.

What causes error code 25509 in MW2?

How do I fix error code 25509 in Modern Warfare 2?

Try some preliminary checks to see if one of them helps fix the error:

  • Restart the Xbox console.
  • Check for Warzone game updates. One of the most common errors does not allow users to update the game and throws up not enough free space errors, yet you can fix them in no time.

If none of the above help, we have some proven workarounds to help you fix the error code 25509.

1. Reset your network hardware

  1. Remove the power cord from the back of the router, modem, or gateway, and wait for 5 minutes. unplug and plug router
  2. If using both a router and a modem, disconnect the power cord from both devices.
  3. Long hold the Xbox button on your console till it shuts down, and then wait for 2 minutes before you start the device again.Xbox console button
  4. Once 5 minutes are up, connect the modem or gateway, and now wait for all the lights to switch on and be normal again. Repeat for your router too.router lights

Now that you successfully power cycled and reset the network hardware, you should not encounter the error anymore.

2. Reset the console keeping games and apps

  1. Press the button on the Xbox device to open the guide.press xbox button
  2. Next, click to expand Profile & system, and select Settings. open xbox settings
  3. Now, under Settings, click on System.xbox system settings
  4. Under system settings, on the right, click on Console info & updates. Console info & updates
  5. On the next screen, click on Reset console on the left. xbox Reset console
  6. You will now see a prompt asking Reset your console? Click on Reset and keep my games & apps.Reset and keep my games & apps

Once done, you can now continue with your game without coming across the error code 25509 in MW2 anymore.

3. Turn off VPN and proxy

  1. Press the Win + I shortcut keys to launch Windows Settings, click on Network & Internet on the left, and then click on VPN on the right. vpn settings
  2. On the next screen, click to expand the VPN connection on the right you want to disable and click Disconnect. disconnect vpn
  3. Now, return to Network & internet, and click on Proxy. proxy settings
  4. Here, under Automatic proxy setup, turn on the Automatically detect settings option. disable Automatically detect settings
  5. Next, under Manual proxy setup, disable the Use a proxy server option.

In case you encounter a proxy error, follow the troubleshooting methods in our detailed post to fix the proxy error in Windows 11.

But, if you are using a third-party service like the Express VPN you can follow the method in our post (also applicable for Windows 11) to disable VPN temporarily or for good.

If all of the above methods fail to fix the error code 25509 in MW2, you can try contacting Call of Duty support via chat, contact form, or over the phone.

While it’s a new error code that has been bugging game lovers recently, these are some of the working solutions we found from different forums.

If you found any other solution for the error code 25509, do let us know in the comments box below.

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