Error http 400 Bad Request (Improper Request)

Network server (running the website) considers that the data flow sent by the customer (eg your browser) was ' malformed ', that is, did not respect the HTTP protocol completely. Therefore, the network server could not understand the request and process it.

This almost always means poor customer system programming and/or network server.

Repairing Errors 400 – General
There is a low level failure on the customer, network server or both. 95% of the time this happens because of a customer system failure, that is, there is something unstable on the PC that runs the browser.

• Is your PC safe? If your PC is not well protected, then various types of problems may occur – including HTTP 400 errors. If you have Windows, remain updated with Microsoft’s automatic safety updates and eventually consider getting a registration cleaner. Always have good anti-virus and spyware protection. Invest in a hardware firewall if you can get one. Be wise when surfing the internet – block pop -up windows and avoid hazardous sites. If your PC safety is compromised, then your PC’s network traffic to the internet may be secretly corrupted by harmful software (spyware, viruses, etc.) running on your PC. It may be difficult to detect this situation.
• Did you install software from the internet? Some social networking and game sites ask you to unload and run software on your PC so that you can interact with others directly on the internet (without using the browser). This software, if it has been poorly conceived or even criminal, can corrupt all HTTP traffic on your PC. It can be difficult to get rid of this defective software. At the worst case you may have to reinstall your operating system again (eventually losing all the data you have on the PC, if you have not made a security copy).

Is your internet connection stable? If you have recently changed ISPs or if your ISP is very slow or insecure, then your PC’s traffic to any website can be corrupt. Your ISP may have reconfigured some settings (for example, introducing new proxy or cache servers that are causing some instability. If you can’t easily browse your ISP website, this is a possible sign of problems. You can also try to check if the web site you are visiting is the one who thinks you are visiting. For example, you may have a DNS problem. You can check this using a ping test. A DNS problem can be caused by your ISP or can be in your own system, for example in a “hosts” file.

• Do you get the error in more than one website? If you get the error in many web sites, this indicates that the problem is from your PC, not those sites.
• Do you get the error if you use more than one browser? If you have two or more browsers installed on your PC and the behavior is not the same (a browser gives the http 400 error when visiting one place and another does not give the error 400 when visiting the same place), so one of the browsers can be defective . Try to find an updating or safety correction for your browser problem. If you recently changed some configuration options in the browser problem, try to reverse the change to see if this solves the situation.
• Do you get the error in large web sites? If you get the problem in a small place, visit some of the big sites like Amazon, Ebay, Google, Microsoft and Yahoo. If you get the problem only in small places, this indicates a problem with only those places or the traffic of your PC to those places.
• Do you get the error in simple URLs? If you get a problem with long and complicated URLs (such as http://www.xxx.com?pprequest=643&amp ;Value=dres&amp ;cookies=NO), but not with a shorter and simpler URL of the same place (as http : //www.xxx.com), this may indicate a problem with the site server of the site you are trying to visit. This is not a conclusive evidence, but it is a good starting point. Contact the web site owners and describe them the problem. You may find that, for example, the problem occurs with POST methods (you want to submit data to the website and to recover data from it), but not with the GET methods (you only recover data from the website). /li>
• Do you have a cache problem? Try to clean your cookies, the browser cache and check your browser history. Disact or remove any third party cache or internet accelerating software that has installed. Then try to restart your PC and any firewall/router you use to connect to the internet. This may not solve the error, but at least you may eliminate any problem due to old configurations on your PC.
• What has changed since it started having the HTTP 400 problem? In general terms, think about what has changed on your PC since the problem began to arise. This can cover any of the items mentioned above. Return and check that the annulment of these changes makes any difference.