Fix An internal error has occurred error for Remote Desktop Connection

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The remote desktop error “An internal error has occurred” is often caused by RDP settings or the security of local group policies. Some reports indicate that users cannot use the Remote Desktop Connection Client to connect to another system. According to reports, this problem came out of nowhere and was not caused by any particular action.

After clicking Connect, the remote desktop connection client locks and the error appears after a few seconds. Since the Remote Desktop Connection is used by many users for professional or personal purposes, this error can be very painful. But don’t worry because you can fix it by reading this article.

What is the cause of the error “Remote Desktop Connection is an internal error”?

How many error messages in Windows this can mean a number of things. In my case, it was a DNS problem. This means that if I put RDP on said computer with its name, my computer was not able to determine its IP address. This error message was therefore issued. Not very useful, but it’s Microsoft Windows for you!

To correct the error “Connection to the remote desktop – an internal error has occurred”:

Configuration of the settings

  1. Open the Connect to Remote Desktop client by searching for it in the Windows search field.
  2. Select the Show Options button at the bottom left of the screen. Go to the Experience tab.
  3. Disable the Reconnect option if the connection is lost.

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Change the MTU value

Another way to solve the problem is to change your MTU value. The maximum transmission unit is the largest size of a packet that can be sent over a network. Decreasing the MTU value can help to solve the problem. Here’s how to do it:

  1. To change your MTU value, you must download a tool called TCP Optimizer. You can download it here.
  2. After downloading, open TCP Optimizer as an administrator.
  3. Select Custom before Settings below.
  4. Change the MTU value to 1458.
  5. Click Apply Changes, then exit the program.

Leaving and re-join a domain

To remove a system from the domain, do the following:

  1. Click the Start button and open the Application Settings.
  2. Go to System > Accounts > Access Work or School.
  3. Select the company you want to disconnect from your computer.
  4. Select Disconnect to disconnect from the company.
  5. Restart the system.

This would disconnect the system from the domain.


The correction suggested in this manual should correct the error message “Remote desktop connection – an internal error has occurred”.

If you have any questions or comments, use the “Leave a Reply” form at the end of this manual.

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