Error: Code 101 - "When requesting a web page, your browser might receive an error status code of 101, followed by an ""Upgrade"" header showing that the requested server is changing to a different HTTP version."

How to fix the Web Error Code Error 101 Switching Protocols

This article features error number Code 101, commonly known as Switching Protocols described as "When requesting a web page, your browser might receive an error status code of 101, followed by an ""Upgrade"" header showing that the requested server is changing to a different HTTP version."

About Status Codes

When you receive web error codes, you may either be having client or server issues. The problem could be related to browser or settings that are blocking your connection, or it can be any other issues related to the server you are trying to access.

To explain the problem further, here are some useful information about web error codes, their symptoms, causes and repair methods.

Definitions (Beta)

Here we list some definitions for the words contained in your error, in an attempt to help you understand your problem. This is a work in progress, so sometimes we might define the word incorrectly, so feel free to skip this section!

  • Browser - A web browser or Internet browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web.
  • Header - This tag is deprecated because it lacks discriminating power
  • Http - Hypertext Transfer Protocol HTTP is an application level network protocol that is used for the transfer of content on the World Wide Web.
  • Protocols - A common means for unrelated objects to communicate with each other.
  • Server - A server is a running instance of a software application capable of accepting requests from a client and giving responses accordingly.
  • Switching - A switch is a telecommunication device that receives a message from any device connected to it and then transmits the message only to the device for which the message was meant
  • Upgrade - This tag refers to the process of replacing a particular system with a newer version of the same system
  • Version - Version defines an unique state of a computer software or a file.
  • Web - Use this tag for general questions related to all aspects of the world wide web

Symptoms of Code 101 - Switching Protocols

Web error codes are also known as http status codes. There are five different classes of http status codes and they always start with the following digits, depending on what kind of error was encountered by the user. These are also the symptoms of the error that the user is experiencing. To explain further, here are the status codes.

1xx: Informational
This is a status response that tells the user or requester of information that the request he has sent was received and is being processed. However, though the request initiated is continuing, there may be some other issues happening which is making it difficult to receive the information being requested. It can mean no response is yet available, and the server is sending this to prevent client time out or to signify that the request was received and not lost. Here are the list of error codes and the message that comes up the webpage:
100 - Continue
101 - Switching Protocols

Fix Switching Protocols (Error Error 101)
(For illustrative purposes only)

Causes of Switching Protocols - Error 101

1XX codes are provided to give information about a continuing action. This kind of code was generated to give the user an idea about what happened after the request was sent.

Repair Methods

There are particular troubleshooting steps for particular Web Error codes. However, there are also generalized repair methods users can perform when faced with these kinds of errors.

If a repair method works for you, please click the upvote button to the left of the answer, this will let other users know which repair method is currently working the best.

Please note: Neither nor it's writers claim responsibility for the results of the actions taken from employing any of the repair methods listed on this page - you complete these steps at your own risk.

up vote 6 down vote accepted
  • If you want to check log files, you may do so by first ensuring that you are logged into the web server computer as an Administrator.
  • Click Start, then Settings, then click Control Panel.
  • Open Administrator Tools and then double-click Internet Services Manager.
  • Select the website from the list of different served sites.
  • Right click the website and then point your mouse to Properties.
  • Select Website tab and then click Properties. On it, you will see General Properties tab. On the bottom of the window, you may see the location of the log files generated.
  • Open log files using WordPad, any text file viewer or Microsoft Word.
  • Here, you should be able to analyze where you got the errors while accessing a server.
  • This troubleshooting is normally handled by the site admin. If that is you, then you need to have an understanding of Web server configurations.
  • You may check which web server is running your site by using URL or domain checkers. You just need to enter the site address and analyze the results that you will get.
  • You may also check for broken links by right clicking the webpage and clicking on Inspect. This should give you the code to the site on the right side. You may check each anchor text and see if the links connected to them are still live.
When accessing a site, data gets stored in the browser cache. Sometimes, you have tried fixing a web error but the same message appears on your browser. In such cases, you need to clear your browser cache to get rid of the annoying message. Here are ways to do that in different kinds of browsers:
  • On Google Chrome
    • Open Chrome and click the three dots on the upper right portion of your browser
    • Click More Tools and then Click Clear browsing data.
    • You may choose to delete everything or just a certain browsing period.
    • Check the boxes beside Cookies and other site data and Cached images and files.
    • Finally, click Clear data.
  • On Edge
    • Click the ... it is the rightmost button just beneath the close button.
    • Scroll down and Click Settings.
    • Look for Clear browsing data, and click Choose what to clear button.
    • It will give you option to choose which type of data you want to clear, just put a check mark on the items you want to include, then click Clear.
  • On Mozilla
    • Go to History menu and select Clear Recent History.
    • You may click the Alt button if the menu bar is hidden.
    • You will see a dropdown menu where you can select the period or range you want to delete, click your selection.
    • You can click on Details to choose what to clear, whether it be the entire cache or other items.
    • Once selected, click Clear now and then reboot the browser to let changes take effect.
  • There are also times when you manually enter the URL of a site you wish to explore. If you are getting errors after doing this, check the URL you just entered on the address bar if you are indeed accessing the correct address. If not, correct the items you typed incorrectly.
For Windows 7
  • Search for Windows Updates on the search bar.
  • Click enter when it comes up on the search results.
  • Check recent updates and click Uninstall updates on recent dates when the error began happening.
For Windows 8 and Windows 10
  • Press the window key and the letter X simultaneously to open Settings
  • When you get to Windows settings, click Update & Security.
  • Click view installed update history, then Uninstall updates.
  • Sometimes, additional Extensions may give you Web Error Codes.
  • Uninstall Extensions you recently installed by going to your browser settings and then clicking More Tools.
  • You will see extensions than had been installed on your browser, choose the latest addition which you suspected caused the problem you are having.
  • You may also check for any unwanted characters on the codes and script by Debug Application Codes and Scripts. If you don't have any idea how to do it, you may check this resource to do that.
  • You may also try to Refresh website. Sometimes, the error you are getting is an old error which has not gone away and a simple refresh by clicking F5 may do the job.
Other languages:

Wie beheben Fehler 101 (Wechseln von Protokollen) - "Beim Anfordern einer Webseite erhält Ihr Browser möglicherweise den Fehlerstatuscode 101, gefolgt von einem ""Upgrade""-Header, der anzeigt, dass der angeforderte Server auf eine andere HTTP-Version wechselt."
Come fissare Errore 101 (Cambiare i protocolli) - "Quando richiedi una pagina web, il tuo browser potrebbe ricevere un codice di stato di errore 101, seguito da un'intestazione ""Aggiorna"" che mostra che il server richiesto sta passando a una versione HTTP diversa."
Hoe maak je Fout 101 (OverstappenÂProtocols) - "Wanneer u een webpagina opvraagt, ontvangt uw browser mogelijk een foutstatuscode van 101, gevolgd door een ""Upgrade""-header die aangeeft dat de aangevraagde server naar een andere HTTP-versie gaat."
Comment réparer Erreur 101 (Changement de protocole) - "Lorsque vous demandez une page Web, votre navigateur peut recevoir un code d'état d'erreur de 101, suivi d'un en-tête ""Mise à jour"" indiquant que le serveur demandé passe à une version HTTP différente."
어떻게 고치는 지 오류 101 (프로토콜 전환) - "웹 페이지를 요청할 때 브라우저는 오류 상태 코드 101을 수신한 후 요청된 서버가 다른 HTTP 버전으로 변경되고 있음을 나타내는 ""업그레이드"" 헤더를 수신할 수 있습니다."
Como corrigir o Erro 101 (Protocolos de comutação) - "Ao solicitar uma página da web, seu navegador pode receber um código de status de erro 101, seguido por um cabeçalho" "Upgrade" "mostrando que o servidor solicitado está mudando para uma versão HTTP diferente."
Hur man åtgärdar Fel 101 (Byta protokoll) - "När du begär en webbsida kan din webbläsare få en felstatuskod på 101, följt av en rubrik" "Uppgradera" "som visar att den begärda servern ändras till en annan HTTP -version."
Как исправить Ошибка 101 (Переключение протоколов) - «При запросе веб-страницы ваш браузер может получить код состояния ошибки 101, за которым следует заголовок« Обновить », показывающий, что запрошенный сервер переходит на другую версию HTTP».
Jak naprawić Błąd 101 (Protokoły przełączania) - „Podczas żądania strony internetowej przeglądarka może otrzymać kod stanu błędu 101, po którym następuje nagłówek „Uaktualnij” wskazujący, że żądany serwer zmienia się na inną wersję HTTP”.
Cómo arreglar Error 101 (Protocolos de conmutación) - "Al solicitar una página web, su navegador puede recibir un código de estado de error de 101, seguido de un encabezado" "Actualizar" "que muestra que el servidor solicitado está cambiando a una versión HTTP diferente".

The Author About The Author: Phil Hart has been a Microsoft Community Contributor since 2010. With a current point score over 100,000, they've contributed more than 3000 answers in the Microsoft Support forums and have created almost 200 new help articles in the Technet Wiki.

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12/06/24 09:01 : A Windows 10 user voted that repair method 2 worked for them.

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Article ID: ACX01638EN

Applies To: Windows 10, Windows 8.1, Windows 7, Windows Vista, Windows XP, Windows 2000

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