Browser Not Supported Error Code 100: 3 Ways to Fix It

Uninstalling recent updates might help you solve the issue

by Claire Moraa
Claire Moraa
Claire Moraa
Claire likes to think she's got a knack for solving problems and improving the quality of life for those around her. Driven by the forces of rationality, curiosity,... read more
Fact checked by Alex Serban
Alex Serban
Alex Serban
Browser & Networking Expert
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server... read more
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  • Error code 100 on your browser usually means that the connection between your computer and the website you are trying to access is broken.
  • Other times, the error may appear because you are using an outdated version of your web browser.
  • If you see this error, it's best to restart your browser but if that doesn’t work, proceed to our advanced troubleshooting.
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Error Code 100 is a browser not supported error code. It indicates that the website you’re trying to visit is not compatible with your browser. This could be due to an outdated browser version or a problem with your operating system.

Generally speaking, older browsers don’t work well with newer websites because they don’t support newer technologies and features.

You may also encounter a this site can’t be reached error, but we have adequately covered various fixes to help you bypass this issue.

What does error code 100 mean? 

Error code 100 is an error code that means the browser could not establish a connection to the server. It can be caused by a number of reasons, so the first thing you should do is check your internet connection.

Other reasons include:

  • Bad response from server – The server might be down or overloaded and cannot handle all of the requests it is receiving at the time hence giving you a bad response. 
  • Unsupported browser – You may also get this error if you are using an unsupported browser. In order to resolve this issue, you will need to upgrade your browser or use another one altogether.
  • Corrupted files – If you’ve just downloaded some new software, then it’s possible that one or more files within that program have become corrupted during download or installation.

In some rare cases, it could also be because there’s a problem with the website’s security certificate. If this is the case, don’t hesitate to check our expert article on recommended fixes.

Quick Tip:

Use a more stable browser if you keep having problems with your current one. We recommend Opera as a stable and lightweight solution.

Running on a Chromium engine, this browser is compatible with all Chrome extensions and includes familiar tools for tabbed browsing, bookmarking, and advanced tools like an adblocker and VPN.


Say goodbye to errors by using this performance-optimized browser!

How do I fix the browser not supported error code 100? 

1. Update your browser

In order to fix the error code 100, all you need to do is upgrade the browser from the one that is currently installed on your computer so it supports all the websites that require a specific browser version. 

By upgrading your current browser, you can ensure that all supported sites will work properly without any errors or crashes in future visits.

2. Clear cache and cookies

One of the most common causes of this error is an outdated cache or cookie file in your browser. You may also be able to fix this problem by clearing your browser’s cache and cookies. 

Clearing your browser cache deletes temporary files stored on your computer by your browser that may be causing sites to load slowly or incorrectly.

3. Uninstall recent updates 

  1. Press the Windows + I keys simultaneously to open Settings.settings-option oops thre was an error
  2. Navigate to Windows Updates, then select Update history.
  3. Click on Uninstall updates.
  4. Select the most recent update, then click Uninstall.

What are the most common browser not supported errors? 

A browser not supported error is an alert that web pages may display to users when their browser is incompatible with a particular website’s requirements. It can manifest in different forms, such as:

  • Error 400 Bad Request – This error occurs when the request sent by the client is invalid or malformed. The server returns this error when receiving a request with an empty body, partial content, or certain characters.
  • Error 404 Not Found – This error occurs when a URL requested by the client does not exist on the server side and cannot be found by the server. It can sometimes happen because of incorrect linking or missing files on your web server.
  • Error 500 Internal Server Error – This typically means that your web server has been unable to process a request because of an internal error or misconfiguration.

You can easily solve most browser errors by updating your browser or clearing cookies. In some cases, you may also not have enough memory for your browser to handle such requests, or a virus has infected your system.

It is why we recommend that you install a reliable antivirus to prevent such occurrences. Hopefully, you have been able to resolve the browser not supported error code 100 from one of our solutions above.

Let us know of any other additional solutions not mentioned here that may have worked for you in the comments section below.

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