The ERR_BAD_SSL_CLIENT_AUTH_CERT error is a common issue experienced by users while browsing the internet. This error occurs when there is an error with the SSL client authentication certificate, preventing the user from accessing secure websites. In this article, we will delve deeper into what causes this error and how it can be resolved, providing a comprehensive guide for users to understand and troubleshoot this frustrating issue. Whether you’re a regular internet user or a web developer, understanding ERR_BAD_SSL_CLIENT_AUTH_CERT can help enhance your browsing experience.



Try part 1

One common error that users may encounter while browsing the internet is “ERR_BAD_SSL_CLIENT_AUTH_CERT.” This error typically occurs when the website that the user is trying to access requires a client SSL certificate for authentication, but the user’s computer is not able to provide one.

Part 1: What is an SSL client certificate and why is it needed?
A Secure Socket Layer (SSL) client certificate is a digital certificate that identifies a specific user or device and is used as a form of authentication when accessing secure websites. It is a way for websites to ensure that the user is who they claim to be and to establish a secure encrypted connection with them.

SSL client certificates are typically used by high-security websites such as online banking, e-commerce sites, or government portals. They provide an additional layer of security by verifying the identity of the user before granting access to sensitive information.

Part 2: Why does the “ERR_BAD_SSL_CLIENT_AUTH_CERT” error occur?
There are a few reasons why this error may occur. Some common causes include:

1. Invalid or expired client certificate: If the client certificate being used is not valid or has expired, it will not be accepted by the website and will result in the error.

2. Certificate not installed: In some cases, the user may have a valid client certificate but it is not installed on their computer. Without the certificate, the website will not be able to verify the user’s identity and the error will occur.

3. Certificate not trusted: A common reason for this error is that the client certificate is not trusted by the website. This can happen if the certificate is self-signed or if it is issued by a certificate authority that is not recognized by the website.

4. Incorrect system date and time: SSL certificates have an expiration date and if the user’s system date and time are incorrect, it can cause the certificate to appear expired and result in the error.

Part 3: How to fix the “ERR_BAD_SSL_CLIENT_AUTH_CERT” error?
Now that we understand the potential reasons for this error, let’s discuss some solutions to fix it.

1. Check the validity of the client certificate: The first step is to make sure that the client certificate being used is valid and has not expired. Check the certificate’s expiration date and renew it if needed.

2. Install the certificate: If the certificate is valid but not installed, follow the instructions provided by the issuing authority to install it on your computer.

3. Try a different browser: Sometimes, the error may be caused by browser-related issues. Try accessing the website using a different browser to see if the error persists.

4. Import the certificate into the browser: If you have installed the client certificate on your computer but the error is still occurring, try importing the certificate into your browser. This will ensure that the website can recognize and trust the certificate.

5. Check system date and time: Make sure that the date and time on your computer are correct. If they are incorrect, update them and try accessing the website again.

6. Contact the website owner: If none of the above solutions work, it’s possible that there may be an issue with the website’s server or with the certificate itself. In this case, it’s best to contact the website owner for further assistance.

In conclusion, the “ERR_BAD_SSL_CLIENT_AUTH_CERT” error can be frustrating when trying to access a secure website. However, by following the steps outlined above, you should

Method 1: Setting the correct time and date (if applicable)

Method 1: Setting the correct time and date (if applicable)

If you’re experiencing issues with your device or applications, it’s important to ensure that your device’s time and date are set correctly. Incorrect time and date settings can cause various problems, such as errors when syncing with an online server, incorrect timestamps on files and emails, and even difficulties with scheduling and reminders. In this blog post, we’ll guide you through the process of setting the correct time and date on your device.

Step 1: Check if your time zone is correct

The first step is to make sure that your device’s time zone is set correctly. This is especially important if you’ve recently traveled to a different time zone or your device has been used by someone else who may have changed the settings. To check your time zone on a Windows computer, follow these steps:

1. Right-click on the clock in the bottom right corner of your screen.
2. Select “Adjust date/time” from the pop-up menu.
3. In the Date & time tab, make sure that the toggle switch for “Set time automatically” is turned on.
4. Under that, make sure your time zone is set correctly. If it’s not, click on “Change time zone” and select the correct one from the drop-down menu.
5. Click on “Sync now” to synchronize your time with the online server.

For Mac users, you can follow a similar process by going to System Preferences > Date & Time and making sure that the option for “Set date and time automatically” is checked.

Step 2: Check if your time and date are correct

Next, double-check that your device’s time and date are set correctly. This is especially important if you’re experiencing issues with timestamps or reminders. Here’s how to do it on a Windows computer:

1. Right-click on the clock in the bottom right corner of your screen.
2. Select “Adjust date/time” from the pop-up menu.
3. In the Date & time tab, make sure the correct date and time are displayed. If not, you can click on “Change” and manually adjust them.
4. Click on “Apply” and then “OK” to save the changes.

Mac users can follow the same process, but instead, go to System Preferences > Date & Time and manually adjust the date and time if needed.

Step 3: Use third-party time and date synchronization tools

If the above steps don’t solve your issue, you can also try using third-party time and date synchronization tools. These tools can help ensure that your device’s time is always accurate by syncing with an online server. Some popular options include Dimension4, Neutron, and SNTP Client.

Step 4: Check for software updates

Sometimes, incorrect time and date settings can be caused by outdated software. It’s important to regularly check for updates for your operating system and other applications to ensure that you have the latest versions. These updates often contain bug fixes and improvements that can help resolve time and date-related issues.

In conclusion, setting the correct time and date on your device is crucial for proper functioning and avoiding potential issues. By following the steps outlined in this blog post, you should be able to easily set and synchronize your device’s time and date. If you continue to experience issues, it may be worth seeking further assistance from a technical support professional. We hope this guide has been helpful, and thank you for reading!

Method 2: Applying every pending Windows update

Method 2: Applying every pending Windows update

lf found check the USB device and compatibitly. error on computer?
Method 2: Applying every pending Windows update
One of the most common reasons for the ‘Code 43’ error on computer is outdated or missing software updates. This can happen due to various reasons such as interrupted downloads, connectivity issues, or even manual user intervention. If you have recently encountered the ‘Code 43’ error on your computer, try applying every pending Windows update as a potential solution. Here’s how you can do it:

Step 1: Open the Settings app on your Windows computer by pressing the Windows key + I on your keyboard or by clicking on the Start menu and selecting Settings.

Step 2: In the Settings app, go to Update & Security.

Step 3: Click on Windows Update in the left pane, and then click on the Check for updates button in the right pane.

Step 4: Wait for Windows to scan for available updates. If there are any pending updates, click on the Download and install now button to start the update process.

Step 5: Once the updates have been downloaded and installed, restart your computer and check if the ‘Code 43’ error is resolved.

If the error persists, try repeating the process a few times, as sometimes certain updates may take longer to install. You can also try running the Windows Update Troubleshooter, which can automatically detect and fix any issues with Windows updates.

If the above steps do not resolve the issue, you can also try manually downloading and installing the updates from the Microsoft Update Catalog website. Here, you can search for the specific updates by their Knowledge Base (KB) number and download and install them manually on your computer.

In addition to this, make sure to keep your drivers up-to-date by regularly checking for updates on the manufacturer’s website or using a driver update software.

In conclusion, outdated or missing Windows updates can often lead to the ‘Code 43’ error on your computer. Applying every pending update can help fix any underlying issues and resolve the error. If you are still facing the error, you may need to troubleshoot further or seek professional help.

Method 3: Updating Chrome to the latest version

Method 3: Updating Chrome to the latest version

One of the simplest ways to fix any issues with the Chrome browser is to make sure that you are using the latest version. Google frequently releases updates for Chrome, which not only add new features but also fix any bugs or glitches.

To update Chrome to the latest version, simply follow these steps:

1. Open Chrome and click on the three dots at the top right corner of the window.
2. From the menu, click on “Help” and then select “About Google Chrome.”
3. This will open a new tab showing the current version of your Chrome browser.
4. Chrome will automatically check for updates and if a new version is available, it will begin downloading and installing it.
5. Once the update is complete, click on the “Relaunch” button to restart Chrome.

Your Chrome browser will now be updated to the latest version, and any issues that you were facing should now be resolved. It’s always a good idea to keep your browser up to date to ensure that you have the latest features and security updates.

If for some reason, Chrome does not automatically check for updates or the update process fails, you can also manually download and install the latest version from Google’s website. Simply go to and click on the “Download Chrome” button.

It’s also important to note that Chrome updates are not only available for desktop versions but also for mobile versions on iOS and Android. So make sure to update your Chrome app on your phone as well.

In some cases, updating Chrome may not resolve the issue you are facing. In such cases, you can try other methods such as clearing the cache and cookies, disabling extensions, or resetting Chrome to its default settings.

In conclusion, updating Chrome to the latest version can fix a wide range of issues with the browser. It’s a quick and easy solution that can save you a lot of time and frustration. So make sure to regularly check for updates and keep your browser up to date for optimal performance.

Method 4: Disabling SSL / TLS protocol filtering from 3rd party AV settings (if applicable)

Method 4: Disabling SSL / TLS protocol filtering from 3rd party AV settings (if applicable)

If you are experiencing issues while browsing the internet and the error message “ERR_SSL_PROTOCOL_ERROR” keeps popping up, there could be a chance that your third-party antivirus software is getting in the way. This antivirus software often intercepts and filters the SSL/TLS connections, resulting in an interruption in the connection between the website and your browser.

Here’s how you can solve this issue by disabling the SSL/TLS protocol filtering from the settings of your third-party antivirus software:

Step 1: Identify the antivirus software

The first step in solving this issue is to identify the third-party antivirus software that you are using. Popular antivirus software includes Avast, McAfee, Norton, and Kaspersky.

Step 2: Open the application

Open the application by double-clicking on its icon, and navigate to the settings or preferences page, depending on which antivirus software you have installed.

Step 3: Locate the SSL/TLS protocol filtering settings

Once you are on the settings page, look for an option that mentions SSL/TLS protocol filtering. This option may be under advanced settings or network settings, depending on the software.

Step 4: Disable the SSL/TLS protocol filtering

To disable the protocol filtering, simply uncheck the box next to the SSL/TLS protocol filtering option. If there are multiple options for this feature, ensure that all of them are unchecked.

Step 5: Save the changes and restart your computer

After disabling the SSL/TLS protocol filtering, click on the “Save” or “Apply” button to ensure the changes are saved. Once done, restart your computer to apply the changes.

Step 6: Check if the issue is resolved

After restarting your computer, open your web browser and check if the ERR_SSL_PROTOCOL_ERROR error is resolved. If the issue persists, you may need to contact the antivirus software’s customer support for further assistance.

Note: Disabling the SSL/TLS protocol filtering may leave your computer vulnerable to cyber threats. Therefore, it is recommended to only do this temporarily and enable it again after accessing the website that was giving you the error.

In conclusion, if you are facing the ERR_SSL_PROTOCOL_ERROR error while browsing the internet, disabling the SSL/TLS protocol filtering from your third-party antivirus settings can often solve the issue. However, it is important to keep your antivirus software up to date and only disable this feature temporarily to avoid any potential security risks.

Method 5: Clearing browser data

Method 5: Clearing browser data

One of the common solutions whenever you encounter issues with your browser is to clear your browsing data. This includes your cookies, cache, and browsing history. Here’s how to do it:

1. Depending on your browser, go to the settings or options menu. This is usually denoted by three vertical dots or lines at the top right corner of your browser.

2. Look for the option that says “Clear browsing data” or something similar.

3. A prompt will appear asking what type of data you want to clear. Make sure to select all the options such as cookies, cache, and browsing history.

4. You can also choose the time range for which you want to clear the data. You can select “All time” to clear all the browsing data from the beginning.

5. Click on “Clear data” or “Delete” to confirm the action.

6. Once the process is completed, restart your browser and try accessing the website again.

Clearing your browsing data can help resolve issues caused by corrupted or outdated data. It also frees up space on your browser, which can improve its performance.

However, keep in mind that clearing your browsing data will log you out of all websites, and you will have to re-enter your login credentials. It will also delete your browsing history, so you won’t be able to go back to previously visited websites using your history.

In conclusion, clearing your browsing data can be an effective solution for various browser issues, but it should be used as a last resort. It is always recommended to first try other troubleshooting methods before resorting to this. It is also a good practice to clear your browsing data regularly to keep your browser running smoothly.


In conclusion, ERR_BAD_SSL_CLIENT_AUTH_CERT is a common error that can occur while browsing the internet. It is typically caused by an issue with the SSL certificate on the client’s side, which can lead to connection failures and security vulnerabilities. However, with proper troubleshooting and understanding of the error, it can be easily resolved. It is important for users to make sure their SSL certificates are up to date and for website owners to properly configure their SSL settings. With these precautions in place, users can have a safe and secure browsing experience. If you encounter this error, do not panic, but instead follow the steps mentioned in this article to fix it and continue browsing with peace of mind.

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