Troubleshoot Error 400

Error 400 – What is it?

Error 400 is a bad request error that displays in the internet browser like a web page. It pops up when the web page you’ve requested cannot be found. Error 400 may be displayed in one of the following formats on the computer screen:

  • ‘400 Bad Request’
  • Bad Request – Invalid URL”
  • “HTTP Error 400 – Bad Request”
  • “Bad Request. Your browser sent a request that this server could not understand.”
  • “HTTP Error 400. The request hostname is invalid.”
  • “400 – Bad request. The request could not be understood by the server due to malformed syntax. The client should not repeat the request without modifications.”

Solution

Restoro box imageError Causes

Error 400 can be generated due to multiple reasons. These include:

  • Wrong URL
  • Browser cookies
  • Outdated DNS cache

Though this error code is not fatal like the blue screen of death and runtime errors nonetheless it is still advisable to fix it to access your desired website without any inconvenience.

Further Information and Manual Repair

Here are some of the best ways to fix error 400 on your PC without any professional help. Try these methods to resolve error 400:

Method 1

This might come to you by surprise that the most common cause for a 400 Bad Request error is because the URL of the website was typed wrong.

So, first things first make sure the URL you’ve inserted is correct. If the URL typed is correct, then try other methods illustrated below.

Method 2

Sometimes error 400 may pop up due to outdated DNS records. DNS cache stores the location (IP addresses) of web servers that contain pages that you’ve viewed recently.

You are unable to access the site if the location of the webserver changes before the entry in your DNS cache updates. If this is the error cause then simply clear your DNS cache to resolve.

Follow these steps to clear the DNS cache on Windows 8.

  • Press Win+X to open the WinX menu.
  • Now ‘right click’ on command prompt and select RUN as Administrator. Enter the following command:
  • ipconfig /flushdns

If the command was successful, you will see the following message:

Windows IP configuration successfully flushed the DNS Resolver Cache.

This method will hopefully repair error 400 on your computer screen.

Method 3

Another reason for error 400 can be browser cookies. Many sites report error 400 when a cookie it reads is corrupt or too old. In such a situation it is advisable to clear your browser cookies.

You can do it manually but it can be time-consuming virtually because the steps involved in deleting cookies differ considerably depending on what web browser you’re using.

So, to avoid the hassle it is advisable to download Reimage to remove browser cookies immediately. This is a user-friendly PC Fixer deployed with a powerful registry cleaner.

It removes all obsolete and unnecessary files from your PC including junk files, internet history, and cookies in seconds.

Click here to download Restoro.

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