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6 Solutions for Fixing ERR_SSL_PROTOCOL_ERROR on Windows 11

Mar 2, 2023

When you use your computer, you may encounter a situation where you cannot open a web page and display an error code like ERR_SSL_PROTOCOL_ERROR. Usually, this happens when the browser is using a protocol to establish a secure connection to the site. Nevertheless, there are several ways you can solve this tricky problem.

Method1. Adjust System Date

When your computer's system time is wrong, it may cause ERR_SSL_PROTOCOL_ERROR, so you can adjust the system time by following the steps below.

Step1. Open the Date & time setting

You can press Win + I to open the settings and select Time & language on the left pane. And click Date & time on the right pane.

Step2. Adjust System Date

In the new window that appears, click the toggle button next to Set time automatically and Set time zone automatically to turn them on.

Method2. Clear SSL State

Cleaning up your computer's SSL state can also help you resolve SSL-related issues, and you can follow the navigation below to do so.

Step1. Open the Internet Properties

Click on Windows Start and type Internet Options. Open the matched item.

Step2. Clear SSL State

Click on the Content tab on the navigation bar and select Clear SSL Cache. Finally, close the window.

Method3. Turn off Virtual Private Network

Virtual Private Network (VPN) may affect the authenticity of the network connection. If you are connected using a VPN, you can deactivate it and reload the network.

Method4. Flush DNS Cache

A corrupted DNS cache in your computer may also cause ERR_SSL_PROTOCOL_ERROR.

Step1. Open the Windows PowerShell

Click on your Windows Start and type Windows PowerShell in the search box, and then open the matched item.

Step2. Enter the command to flush DNS Cache

You can copy and paste the following command and hit Enter.

ipconfig /flushdns

Method5. Set Up Automatic Proxy

You can also fix ERR_SSL_PROTOCOL_ERROR by setting up Automatic Proxy.

Step1. Open the computer’s proxy

Press Win + I to open Settings. Select the Network & internet on the left side of the new window that appears, then select Proxy on the right pane.

Step2. Turn off Automatically detect settings

In the settings window that appears, toggle the switch button next to Automatically detect settings to off.

Method6. Disable QUIC Protocol

If you are using the Chrome browser, then you can also fix this tricky problem by disable QUIC Protocol.

QUIC is a new protocol developed by the chrome browser to improve performance. If there is a problem with QUIC, it can also cause problems with SSL, so you can fix the web page's unresponsiveness by disabling QUIC.

Step1. Find the location of the QUIC Protocol

You can copy the following address and paste it into the address bar of your Chrome browser and click Enter, which will help you navigate to QUIC Protocol.


Step2. Disable QUIC Protocol

Click the pull-down menu next to Experimental QUIC Protocol and select Disabled. And then select Relaunch.

You’re very frustrated when you try to access a web page only to get an error code like ERR_SSL_PROTOCOL_ERROR. Fortunately, you can fix it in the above way. If you have other difficulties with computer use, welcome to visit WiseCleaner.