By Ellie / Last Updated July 7, 2022

The issue: Because of a security error on RDP

“I’m the IT Manager for a firm with five offices, and we usually use Remote Desktop to connect to our office servers. Recently, I have had a computer having an issue getting into one server. When I type in the IP address and user name and try to connect, I get the error message: ‘Because of a security error, the client could not connect to the remote computer.’ Any thoughts on what could cause this? Thanks for your time.”

RDP Security Error

Three confirmed solutions to fix Because of a security error

"Because of a security error" on Remote Desktop Connection is a typical RDP problem. Don't worry, here in this post, we provide you with three solutions to help you easily fix the "Because of a security error on RDP".

Solution 1. Disable the firewall rules

The main function of the Windows Defender Firewall is to manage incoming and outgoing connection requests. In some cases, it may block RDP connection requests. Therefore, we need to disable it to fix the problem.

Step 1. Press Win + R and then type in “control panel” and hit OK to open Control Panel.

Run Box Control Panel

Step 2. Navigate here: Control Panel > System and Security > Windows Defender Firewall.

Defender Firewall

Step 3. Click Turn Windows Defender Firewall on or off in the left sidebar.

Turn Off Windows Defender Firewall

Step 4. Select Turn off Windows Defender Firewall under the Private network settings, and select Turn off Windows Defender Firewall under the Public network settings.

Change Network Settings Firewall

Step 5. Then go back to the Windows Defender Firewall page, find and click Advanced settings.

Firewall Advanced Settings

Step 6. Click Inbound Rules, right-click the items related to Remote Desktop and select Disable Rule in the expanded menu. After this, try the remote connection again.

Disable Remote Desktop Rules

Solution 2. Delete Registry values

This “Because of a security error on RDP” issue may occur if a certificate on the Remote Desktop server is corrupted. To solve the problem, you can delete the corrupted or misplaced certificate.

Step 1. Invoke the Run dialog box and then type in “regedit” and hit OK to open Registry Editor.

Run Box Regedit

Step 2. Navigate here: Computer > HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > Terminal Server > RCM.

RCM

Step 3. Click File and then Export to export the Registry File, type exported-Certificate in the File name box, and then click Save.

Export File

Step 4. On the right pane of the RCM, right-click each of the following values, click Delete, and then click Yes to verify the deletion:

  • Certificate
  • X509 Certificate
  • X509 Certificate ID
  • X509 Certificate2

Step 5. Quit Registry Editor, and then restart the Remote Desktop.

Solution 3. Configure authentication and encryption 

You can also try to resolve the issue by configuring authentication and encryption.

Step 1. Invoke the Run dialog box and then type in “gpedit.msc” and press OK to open the Local Group Policy Editor window.

Local Group Policy Editor Window

Step 2. Navigate here: Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security

Remote Desktop Session Host Security

Step 3. Find and click Set client connection encryption level, Require use of a specific security layer for remote connections and Require user authentication for the remote connection by using Network Level Authentication. Change their status to Enabled respectively.

Enable Encryption Level

Enable RDP Security Layer

Enable User Authentication

Remote control without security error: AnyViewer

If you still can’t solve the “Because of a security error on RDP” issue after trying the above three solutions, here we recommend you a remote control solution without security error, AnyViewer. It is a free remote control utility, especially for Windows and Windows Servers.

It provides you with the easiest way to achieve an unattended remote connection. Next, we’ll introduce the connection method in detail.

Download Freeware Win 11/10/8.1/8/7
Secure Download

Step 1. Download, install and launch AnyViewer on both computers.

Download AnyViewer

Step 2. Go to Log in, and then click Sign up. (If you already have signed up on its official website, you can log in directly.)

Log in AnyViewer

Step 3. Fill in the signup information.

Sign Up for AnyViewer

Step 4. Then you can see you successfully logged in to AnyViewer. Your device will automatically be assigned to the account you've logged in to.

Free Editions

Step 5. Log in to the same AnyViewer account on the two devices, then you can achieve a direct connection by clicking Remote control.

Connect to My Devices

Notes:✎...

You can also upgrade your account to a Professional or Enterprise plan. What can a professional or enterprise plan brings to you:

Faster file transfer speed. Transfer speed for a free account is 500 KB/s, and for a paid account is up to 10 MB/s.
Increasing number of files transferred in bulk.
Larger size of a single file that can be transferred.
More devices can be assigned to the same account for unattended remote access.
More Currently connected devices are displayed for management.
Connect in privacy mode to protect privacy.

In conclusion, as you can see, the whole connection process with AnyViewer is pretty straightforward. You won’t encounter any security errors anymore. So if you are looking for a better remote desktop experience, try AnyViewer right now.