• Proxy errors are fairly common for people who use proxy services to connect to the internet.
• A proxy error occurs when servers don't receive clients' requests or identify them as unauthorized access.
• Depending on the error type, various solutions can help you fix the errors.
• This problem can be resolved by using the Command Prompt's flush DNS command, disabling the proxy server, resetting network settings, and so on.

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The annoying experience of receiving proxy errors is the same no matter whether you’re running Windows 11 or another operating system.

Typically, proxy error messages indicate that you are not allowed to enter a specific website or web page. Also, it shows that there are multiple sources of requests in a short time.

For example, if you have attempted several log-ins to your account, the server will block the request and hinder the connection.

These issues are often server-side problems. However, there are cases that the error source traces back to the client-side in Windows 11, such as some system misconfiguration.

So, to fix Windows 11 proxy error, you need to apply some changes or reset your settings. For this reason, we present you with helpful instructions to fix this problem.

What causes proxy errors?

There are several reasons why these errors occur. When you receive proxy errors, the most common cause is a misconfiguration on your computer’s part, namely in the proxy settings.

However, there are cases that which proxy errors are the result of websites denying unauthorized access to their pages to keep them safe from attacks.

Simply put, for security issues, the server blocks requests from the client.

It’s possible that you’re browsing the web through a rogue proxy server, and that websites are flagging you as a potential threat to their systems as a result of your activity.

How can I fix Windows 11 proxy error?

1. Use Command Prompt

To begin, go to the Start menu and type CMD, then right-click on Command Prompt and select Run as administrator from the menu that appears.

Now, type the following command and then press Enter:
ipconfig /flushdns

Next, type this command and hit Enter key again:
nbtstat –r

Next, type this command and hit Enter key again:
netsh winsock reset

Finally, restart your Windows PC. If your problem still exists, we head into the next workaround. So, let’s jump into it.

2. Disable proxy server

In the left pane, choose Network & Internet, then scroll down and click Proxy.

Select Edit next to Use a proxy server option in the Manual proxy setup section.

Toggle off Use a proxy server and click on Save. Then, close Settings.

A proxy error may occur because of changing user IP addresses. So, to solve this, you must toggle it off in Network & internet settings.

3. Use a dedicated software

If you’re new to computers or have trouble following instructions, reliable troubleshooting software maybe your best option.

There are many useful programs out there for troubleshooting Windows problems, like Restoro, which is one of our favorites.

You can fix Windows 11’s proxy problem using this software. Simply perform a scan and let the program handle the rest to resolve the issues. Also, it can remove malware, identify risky websites, and so on.

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4. Do a network reset

While it is the simplest way, network reset has shown to be one of the most effective solutions because it restores the default network settings and resolves proxy issues.

5. Reset browser settings

Open up your web browser, for example, Chrome. Then, click on the three-dot menu just on the top right side and select Settings.

Now, select Advanced and scroll down to Reset and clean up option then click it.

Select Reset settings. Then, you’ll have to wait a little time for the process to complete.

You can troubleshoot proxy errors just by restoring Chrome settings to default. Note that this process cleans up all your cookies.

6. Perform malware scan

Proxy errors can be caused by malicious programs or viruses. So, if you’ve lately visited a suspicious website or downloaded any strange software, there’s a chance your computer has been infected.

Install powerful security software like ESET Internet Security and run a scan. Then, leave the software to handle the rest of the work.

ESET Internet Security is capable of real-time protection. Also, ransomware and phishing attacks are all prevented by using this software on the PC.

7. Modify the Registry

Now, type Regedit in Run and press OK.

Then, navigate to: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings.

Right-click on the value and select Delete.

Modifying the registry incorrectly would lead to further serious problems. So, make sure you do the process carefully.

8. Disable proxy LAN settings

Type inetcpl.cpl then hit Enter.

Once the Internet Options window opens up, go to the Connection tab and select LAN settings.

Now, under Proxy server section, uncheck the Use a proxy server for your LAN box and click on OK to save changes.

9. Uninstall your network adaptor

Expand Network adapters, then right-click on your network adapter and choose Uninstall device from the menu that appears.

Now it’s time to reinstall network driver. To do this, open up Device Manager again then click on Scan for hardware changes.

It is recommended that you download and run DriverFix if the driver was not able to be installed successfully.

Following the installation of this application, it will scan your computer for and install any missing drivers that are found.

One of the advantages of using this tool is that it will scan your computer for outdated drivers and update them, resulting in a significant boost in the overall performance of your computer.

What are the main types of Windows 11 proxy errors?

For the client-side, proxy errors are categorized in 4xx classes. So to fix Windows 11 proxy errors, you may need to know them from scratch.

• 400- a Bad Request: It rises from an invalid client request. It is either due to malformed requests or incorrect syntaxes
• 401- an unauthorized error: This error occurs when a client sends unverified authentication credentials to the server. It is attributed to DNS. You can solve it by clearing browser cookies
• 402- a payment requirement: This infrequent error mainly functions as a means for digital payment systems. According to Mozilla. developer, it is ” a nonstandard response status code that is reserved for future use”
• 404. Object not found: This error is a common proxy error that drives from incorrect or dead URLs. This error occurs when an URL changes without redirection
• 407. Proxy Authentication Required: This error occurs when the server identifies a client as unauthorized access. So, you have to make changes in proxy settings to fix this issue
• 429. Too many requests: When a client sends many requests to a server in a short period, you see this error. You can also see this error while logging into your account successively

If you’re having trouble connecting to a proxy server in Windows 10, we recommend that you read this article.

There are a bunch of ways to fix Windows proxy errors. Some of them are attributed to changing proxy settings, and you can alter the settings, for example, LAN settings, or reset them to the default.

You can also make registry changes, but you must exercise caution when doing so because incorrectly modifying it may result in even more problems.

Please let us know which solution worked best for you in the comments section below.

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