How to Fix the "Protocol Error at the Client (Code 0x1104)" on Windows

In this guide, you will learn how to fix the Remote desktop connection protocol error 0x1104.

When you’re trying to connect to a Windows server you might encounter the error as seen below.

Method 1. Allow remote connections on the Windows

The very first thing you need to check is that remote connections are enabled on the windows.

Step 1. Press Win + R to invoke the Run dialog box. Then type in “sysdm.cpl” and hit OK to open System Properties.

Step 2. Locate and click Allow remote connections to this computer and click Select Users.

Then, try to connect to the RDP.

Method 2. Remove all checkmarks under Experience tab

Sometimes, the Remote Desktop Connection settings might cause the error code 0x1104. Follow the steps below to un-tick all the options.

Step 1. On the computer, search for Remote Desktop Connection in the Search box. And then open it.

Step 2. Click Show Options.

Step 3. Go to Experience tab, and then remove all checkmarks.

Method 3. Edit Windows Firewall setting

Sometimes, the Windows Firewall might block the remote connection. Therefore, you can edit the Windows Firewall setting to allow Remote Desktop through Firewall.

Step 1. Press Win + R, then type in “control panel” and hit OK.

Step 2. Then select System and Security.

Step 3. Click Windows Defender Firewall.

Step 4. Click Allow an App or Feature Through Windows Defender Firewall.

Step 5. Then select  Remote Desktop and hit OK.

Then, try to connect to the RDP.

Conclusion

In our case after performing the above steps, we did not see the error again.

Hopefully, this article will be useful for you. Good luck!