Fix: Zoom Unable to Connect Error Code 5003

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Zoom unable to connect error code 5003

Due to the pandemic, almost everyone from teachers to business professionals started using Zoom to conduct online classes and their meetings. Just like other applications Zoom users also face errors now and then. Recently users have reported getting unable to connect error code 5003 on Zoom. Are you also getting this error? Don’t worry about got a long list of solutions for you. Let’s get right into it.

Restart Zoom Application

When you get unable to connect error on zoom, the first thing to do is to restart your zoom application. When you restart zoom, it clears out the additional built-in memory and makes your next session smooth and lag-free. You cannot just close your zoom application by pressing (X) and opening it again to restart. To completely exit zoom, follow these steps:

1.      Open task manager by right-clicking on the taskbar or pressing Ctrl +Alt + Esc on your keyboard.

2.      Under the processes tab, go to windows processes to check whether it shows the zoom application still running.

3.      If it is still running, right-click on the Zoom app and select End task.

4.      Once done, wait for a few seconds and relaunch the Zoom application to confirm whether it started working again.

Restart Zoom Application

Update Zoom

Make sure that you are using an updated version of Zoom. The updated version of the application will fix any errors that exist in the old version. Here’s how you can do it:

1.      Open your Zoom app and click on Profile.

2.      Select the Check for Update option.

3.      If you see any update, follow on-screen prompts until you see the message, you are up to date.

Go to your general settings of Zoom and select the Automatically keep Zoom desktop client up to date option. This will keep your Zoom application updated at all times and you won’t have to do it manually.

Update Zoom

Run the Troubleshooter

Sometimes you face connection errors due to glitches and bugs in your network connection. Running the troubleshooter can help you with poor network issues. Here’s how you can do that:

1.      Press Windows + I key on your keyboard to open Settings.

2.      Click on the Update & Security option and go to Troubleshoot.

3.      Now, select Internet Connections and click on the Run the Troubleshooter option.

4.      Choose the Troubleshoot my connection to the Internet option.

5.      Wait for a few seconds, until the troubleshooter detects problems.

6.      Follow on-screen instructions to fix the problem. Simply click the Apply this Fix button.

7.      Once you complete the process, check if the error still occurs.

Run the Troubleshooter

Check Zoom servers

Sometimes Zoom servers are down, due to high traffic or any technical glitch on the application. This might prevent you from attending your meetings and you can face being unable to connect on Zoom.

It is better to check whether the problem is from your end or on Zoom. Make sure to check Zoom servers before jumping to more technical solutions. Here’s how you can do it:

1. Open your web browser and go to You can check the functionality of all services individually.

2. If it shows All Systems Operational, it means all the servers are working fine. But if you see any issues shown, then you have to wait for some time until servers start running again.

Add Zoom as Trusted Site

Sometimes Windows 10 consider some websites and apps insecure if they are not added to the trusted site list. This only happens because windows 10 objective is to improve the overall security of your system. That’s why we advise you to add Zoom as a trusted site to avoid any inconvenience. Follow these steps to do so:

1.      Search the control panel on your taskbar and Open it.

2.      Go to Network and Internet and then click on Internet Options.

3.      Select the Security tab, click on Trusted Sites and click Ok.

4.      In the next window add and other Zoom programs in the Add this website to the zone section and click Add after adding each site.

Add Zoom as Trusted Site

      5. Close the Trusted Sites window. Click on Apply and Ok to save changes.

Add Zoom as Trusted Site

Disable Firewall

Windows Firewall usually protects your system from interference especially when connected to an internet connection. That’s why it’s important to enable it, especially while browsing the web, as it keeps your system’s security intact. However, sometimes when Firewall settings are not configured properly it can cause a network connection. Due to this error like being unable to connect on Zoom appears.

It is better to disable your Windows Firewall temporarily to get rid of error code 5300. Here’s how to do it:

1.      Go to the Start menu on your task manager and select Settings.

2.      Navigate to Update and Security > Widows Security.

3.      Choose Firewall and Network Protection. Select a network profile.

4.      Scroll down to the Microsoft Defender Firewall section and turn it off.

5.      Once done, check if this fixed the error.

1.      Similarly, you should temporarily disable antivirus to avoid this error.

Check Firewall settings

If you’re unsure about disabling Windows Firewall, you can just simply check the Firewall setting to make sure that Zoom is in the whitelist of the Windows Firewall. Follow these steps to check that:

1.      Click on the windows icon and search for Windows Defender Firewall and open it.

2.      Click on Allow an app or feature through the Windows Defender Firewall option.

3.      Select Change Settings and look for the Zoom app from the list.

4.      When you find the Zoom application, checkbox private and public options next to it. If you are unable to find Zoom, use Allow another app option to browse the Zoom application.

5.      Click on Apply and Ok to save changes.

6.      After completing these steps, check whether your error is resolved. 

Reset Network Adapter Settings

You can reset network adapter settings to fix the unable to connect error on Zoom. Follow these steps to do so:

1.      Press Windows key + R on your keyboard to open the run dialog box.

2.      Type cmd and press Ctrl + Shift + Enter to open the command prompt.

3.      In the command prompt, type the following command and press Enter to execute:

ipconfig /flushdns

4.      After that, type the second command and press Enter to execute:

netsh winsock reset

5.      Close the command prompt. Restart your system and launch Zoom.

Reset Network Adapter Settings

Change DNS server

One of the quick fixes is to change to different DNS servers. It will increase your network speed and you’ll be able to attend your meetings on Zoom seamlessly. Here’s how you can change to a different DNS server:

1.      Press Windows + R keys simultaneously on your keyboard.

2.      In the run dialog box, type control, and press Enter.

3.      Click on Network and Internet and choose Network and Sharing Center option.

4.      Choose Change Adapter Settings from the left side menu.

5.      Right-click on the connection you are currently using and select Properties.

6.      Scroll down and click on Internet protocol version 4 (TCP/IPv4) and then click on the Properties button.

7.      Select Use the following DNS Server addresses.

8.      Type into the Preferred DNS server, then into the Alternative DNS server. This will change your DNS to a popular server.

9.      Click Ok to apply your changes.

10.  Try using Zoom and check if the error is solved.

Change DNS server

Disable VPN

VPN is used for privacy purposes but it can slow down your internet connection. Especially when connected to a slow VPN server, it will slow down your internet.

1.      Make sure to exit from Zoom and close all Zoom programs.

2.      Search Proxy in the taskbar and click on Open.

3.      Turn off Automatically detect settings, Use setup script and Use a proxy server setting.

4.      Launch Zoom and check if you come across an unable to connect error.

This solution works, if you don’t have Zoom application on your system instead you’re using it on a web browser. 

Disable VPN

Disable Proxy servers

As unable to connect error on Zoom is mostly due to network connection, you can check and disable your proxy servers. Proxy servers sometimes restrict the Zoom servers to work properly. Disabling them might help you get your Zoom running again:

1.      Press Windows + I key on your keyboard to open Settings.

2.      Go to Network & Connections.

3.      In the Network & Connections, click on Proxy from the left-side menu.

4.      Make sure Use a proxy server is turned off.

5.      Once done, open the Zoom to check if their error is resolved.

Reinstall Network Drivers

Sometimes, when the network drivers are not properly installed it can create problems to your network connection. If none of the above solutions work, we suggest you reinstall network drivers on your system by below steps:

1. Search for Device Manager in the search bar of your task manager and Open it.

2. Click on Network Adapter and expand it.

3. Right-click on your current network adapter and choose Uninstall Device option.

4. Follow the on-screen prompts to complete the process.

5. Launch Zoom to check if an error still appears.

Reinstall Network Drivers

Reinstall Zoom

If you have tried out all the solutions, you can try re-installing Zoom. All the settings will be reset back to their original defaults. There’s a high probability that it’ll help you get rid of your connectivity error. Follow these steps if you don’t know how to delete a program and reinstall it:

1.      Go to the Control Panel of your computer.

2.      Select the Programs and Features option.

3.      Look for Zoom from the list and click on it. Select the Uninstall option. 

4.      Follow the on-screen prompt. Restart your system after uninstallation.

5.      Go to your web browser and open Zoom’s official website. Download Zoom.

6.      Now, go to your downloads, launch the downloaded zoom file.

7.      Follow the on-screen prompt to complete the process of installation.

Uninstall Zoom

Contact Zoom Support

If none of these fixes work for you, Contact Zoom Support. You can write in detail about your problem and wait for their response. Make sure to mention all the solutions that you have tried.

We hope this guide fixed your unable to connect error on Zoom. Let us know which solution worked for you. If you have any questions about the guide let us know in the comment section below.

If you found this guide helpful, you will find our other guides worth reading too.

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