The 400 Bad Request error is an HTTP status code that ensures that the request you sent to the site server, often something easy like a request to load a web page, was somehow incorrect or corrupted and the server couldn’t understand it.
The 400 Bad Request error displays within the internet web browser window, just as web pages do. 400 Bad Request errors, like all errors of the type, could be understood in any operating system and in any browser.
In Internet Explorer, “The webpage cannot be found” message indicates a 400 Bad Request error. The IE title bar will say HTTP 400 Bad Request or something very much like that.
Windows Update may also report HTTP 400 errors but they display as error code 0x80244016. A 400 error that’s reported for a connection within a Microsoft Office application will often appear as a The remote server returned an error: (400) Bad Request. The message within a small pop-up window.
Cause of 400 Bad Request Errors
The 400 Bad Request error is often caused by entering or pasting the incorrect URL in the address window but there are some other relatively common causes also.
Notice: Web servers running Microsoft IIS often give more specific details about the cause of a 400 Bad Request error by suffixing a number after the 400, as in HTTP Error 400.1 – Bad Request, meaning Invalid Destination Header. You can see a complete list here.
How to Fix 400 Bad Request Errors
The Web server (running the Web site) thinks that the data stream sent by the customer (e.g. your Web browser or our CheckUpDown robot) was ‘malformed’ i.e. did not respect the HTTP protocol completely. So the Web server was unable to understand the request and process it.
It almost always means bad programming of the client system and/or the Web server.
Fixing 400 errors – general
There’s a low-level issue in the client or the Web server or both. 95% of the time this is because of a problem on the client system e.g. there is something unstable on your PC running the Web browser.
Is your PC protected?
If your PC is not well-protected, then all sorts of problems may occur – including HTTP 400 errors. If you run Windows, stay up to date with automatic security updates from Microsoft and maybe consider getting a registry cleaner. Always have good anti-virus and spyware protection. Invest in a hardware firewall if you’re able to afford one. Be sensible surfing the Web – block pop-up windows and avoid bad sites. If your PC security is compromised, then Internet traffic out from your PC to the Internet may be secretly corrupted by malware running on your computer. This can be difficult for you to detect.
Have you installed web-based applications?
Some social networking and games websites ask you to download and run software on your PC so that you can interact with other people on the world wide web directly. This software, if badly written or even criminal, can corrupt all HTTP traffic from your PC. Getting rid of that defective software can be hard. At worst you might have to reinstall your operating system.
How stable is your Internet connection?
For those who have recently changed ISPs or your ISP is quite slow or unreliable, then Internet traffic from your PC out to any site online may be corrupt. Your ISP may have reconfigured some of their setup that is causing some instability. A possible indication of problems here is if you can not easily navigate the Web site of your ISP.
In my research and understanding and expertise with this error, it is related to a corrupt website cookie or maybe something else related to your browser cookies or even corrupt files on your system. In any event, the only way I managed to fix the error is by taking away the website cookies it has stored on your PC.
The cookie removal process is extremely easy when you know how. Below I will show you how you can do this via 3 different browsers. Chrome, FireFox and Internet Explorer. Based on the type of system and browser version you’re running in may seem different.
How To Delete Individual Cookie in Chrome
- Go to the setting > select Show advanced setting
- Select the Content Setting under Privacy > Select the All cookie and site data > enter the domain that’s returning the Bad Request error in the search.
- Select the domain from the returned results and press the Remove all button
How To Delete Individual Cookie in FireFox
- Go to the drop down menu then Options and then select Options > Select the Privacy TAB > select Remove individual cookies > enter the domain that’s returning the Bad Request error.
- Select the domain > Remove All Cookies button.
How To Delete Individual Cookie in Internet Explorer
- Go to the setting > Internet Options > General TAB under Browsing history select Settings > Select the View Files link.
- Find cookie file causing problems and delete.
Hope you liked this article on How to Remove and Fix The 400 Bad Request Error, 400 Bad Request Nginx, 400 Bad Request Android. Comment below if you need any help.