您可能在设备上遇到了404 Page Not Found错误，现在您不知道如何处理它，对吧？好吧，别担心！在本指南中，我们将解释为什么会发生此错误以及修复此错误的所有有用方法，包括可能的原因。所以让我们开始吧。
什么是 404 页面未找到错误？
在开始之前，您需要知道这个错误到底是什么以及它是如何发生的？这实际上是一个HTTP 状态码(HTTP status code)，通常在您尝试访问网站上不存在的网页时出现。需要明确的是，它表明您尝试打开的页面在服务器上不可用。
- 要么被删除，要么
- 搬到某个地方，或
- URL 中可能有错字。
例如，假设您单击链接以打开网站页面，但突然遇到一条错误消息，显示类似404 Page not found。此消息从服务器发送到发送HTTP请求的浏览器。
不同(Different)的网站可能会以不同的形式显示此错误。以下是网站用于此错误的一些常用名称。它们如下——
错误 404 未找到
404 错误
404 未找到
HTTP 404
错误 404
HTTP 404 未找到
404 文件或目录未找到
404 页面未找到
在此服务器上未找到请求的 URL [URL]
如何修复 404 Page Not Found 错误
作为最终用户，您在这里可以做的很少。但请尝试以下建议：
- 硬刷新页面
- 检查 URL 中的错误
- 使用搜索栏
- 清除浏览器的(Browser)缓存(Cache)和Cookie(Cookies)
- 更改您的 DNS 服务器
- 联系网站
让我们详细了解它们
1]硬刷新页面
它并不总是发生，但有时您可能会在尝试访问网页时遇到 404 Page Not Found 错误。(Found Error)即使不存在更多真正的问题，也可能有很多原因。在这种情况下，简单的刷新可能会解决问题并正确加载页面。
使用Ctrl+F5功能键可以很容易地执行此操作。或者，转到浏览器的地址栏，然后单击刷新(Refresh)按钮。但是，它并不总能解决问题，但由于它需要很短的时间，您可以尝试一下。
2]检查URL中的错误
有时 404 Page Not Found Error也可能因为使用错误的URL而出现。因此(Therefore)，请确保您在地址栏中输入的URL是正确的。(URL)
输入错误(Mistyped)也可能是URL地址栏中正斜杠和反斜杠的错位。因此，请正确检查URL，然后再次打开该页面。
在上面的快照中，您可以看到URL 输入(URL)错误并导致错误Page not found。
3]使用搜索栏
有时，当您访问一个网站时，您会发现其内容非常简单易懂。在这种情况下，您可以将该页面添加为书签，以便在需要时使用它。
下次需要打开页面时，在地址栏的域名旁边输入相关关键字，然后回车。
这样，您可能会遇到我发现的 404 Page Not Found 错误。(Found Error)
为了避免此类问题，您需要使用相关关键字在网站上执行搜索。即使您访问的网站出于某种原因更改了URL ，这仍然有效。(URL)
但是，如果您正在尝试的网站没有自己的搜索框，您会怎么做？
好吧，在这种情况下，您需要浏览您喜欢的搜索引擎，例如Google、Bing或任何您使用的搜索引擎。
然后，输入“站点：域名相关关键词(site: domainname relevantkeyphrase)”。
在上面的快照中，您可以看到我使用相同的方法“site:thewindowsclub.com 对称和非对称”来搜索相关主题。
4]清除浏览器的(Browser)缓存(Cache)和Cookie(Cookies)
如果您能够从其他设备访问该站点，并且该问题仅在您的计算机上可见，则可能由于您设备中的可用缓存而发生错误。在这种情况下，您需要清除默认浏览器的缓存和 cookie(clear out the cache and cookies of your default browser)。
清除缓存和 cookie 不会影响您的浏览体验。但是，某些站点的加载过程可能需要几秒钟。这是因为他们必须再次下载以前缓存的数据。
5]检查缓存副本是否存在
如果您确定该页面已被删除，但您仍想查看它是否可见，请查看该网页的缓存版本(cached version of the webpage)是否可用。
5]更改您的DNS服务器
在访问一个网站时，如果大部分页面都提示您 404 Page Not Found Error而所有这些都可以在其他网络（例如手机）上使用。在这种情况下，您的 ISP 可能阻止了对该特定网站的访问，或者DNS服务器响应不佳。
因此，为了解决此问题，您可以更改更改 DNS 设置(change your change DNS settings)，然后再次尝试访问该站点。更改DNS服务器后，检查它是否修复了错误 404。如果仍然存在，请尝试刷新 Windows 设备中的 DNS 缓存(flush DNS Cache in your Windows devices)。
6]联系网站
不幸的是，如果上述方法都不适合您，那么联系网站代表将是最后的手段。
在联系网站代表时，向他们询问您遇到的 404 Page Not Found 错误。(Found Error)
受影响的页面可能会被移动或删除。但是，代表人可以很好地解释为什么会发生这种情况。
What is 404 Page Not Found Error and What can you do if you see it?
Chances are that you haνe encountered a 404 Page Not Found error on your device and now you don’t know how to deal with it, right? Well, don’t worry! In this guide, we will explain why this error occurs and all the useful ways to fix this error including the possible causes. So let’s get started.
What is 404 Page Not Found Error?
Before you begin you need to know what exactly is this error and how does it occur? This is actually an HTTP status code, often appears when you try to visit a web page that doesn’t exist on the site. To be clear, it suggests that the page you are trying to open is not available on the server.
- It has been either deleted,
- Moved somewhere, or
- There could be a typo in the URL.
For example, suppose you click on a link to open a page of the website but suddenly you encounter an error message that says something like 404 Page not found. This message comes from the server to the browser that sends the HTTP request.
Different websites may display this error in different forms. Here are some common names that the websites use for this error. They are as follows –
Error 404 Not Found
404 Error
404 Not Found
HTTP 404
Error 404
HTTP 404 Not Found
404 File or Directory Not Found
404 Page Not Found
The requested URL [URL] was not found on this server
How to fix 404 Page Not Found Error
You as an end-user can do very little here. But try these suggestions:
- Hard Refresh the Page
- Check for errors in the URL
- Use the search bar
- Clear Cache and Cookies of your Browser
- Change your DNS Server
- Contact the Website
Let us see them in detail
1] Hard Refresh the page
It doesn’t happen always but sometimes you may possibly experience 404 Page Not Found Error while trying to access a web page. There could be many reasons for this even though no more real issue exists. In such a case, a simple refresh may solve the problem and load the page properly.
This can be performed quite easily by using the Ctrl+F5 function keys. Alternatively, go to the address bar of your browser and click on the Refresh button. However, it doesn’t always fix the problem but since it takes a pretty small time, you may try it.
2] Check for errors in the URL
Sometimes 404 Page Not Found Error can also appear because of using mistyped URL. Therefore make sure the URL you have entered in the address bar is correct.
Mistyped can also be the misplace of the forward and backward slashes in the URL address bar. So, check the URL properly and then open the page again.
In the above snapshot, you can see the URL is mistyped and that result in error Page not found.
3] Use the Search bar
Sometimes it happens you visit a website and you find its contents quite straightforward and easy to understand. In that case, you bookmark that page to use it when required.
The next time when you need to open the page, you type the related keyword next to the domain name in the address bar and then hit enter.
That way, it is possible you may meet the 404 Page Not Found Error as I found.
In order to avoid such an issue, you need to perform a search on the website using the related keywords. That would work even if the website you visit has changed the URL for whatever reason.
But what will you do if the website you are trying doesn’t have its own search box?
Well, in that scenario, you need to browse your preferred search engine like Google, Bing, or whatever you use.
And then, type “site: domainname relevantkeyphrase“.
In the above snapshot, you can see I have used the same method “site:thewindowsclub.com symmetric and asymmetric” to search the relevant topic.
4] Clear Cache and Cookies of your Browser
If you are able to access the site from other devices, and the problem is only visible with your computer then the error might be occurred due to available cache in your device. In that case, you need to clear out the cache and cookies of your default browser.
Erasing the cache and cookies will not have an effect on your browsing experience. However, some sites might take a few seconds for the loading process. It is because they would have to download the previously cached data again.
5] Check if a cached copy exists
If you are sure that the page has been deleted, but you would still like to see if it is visible, see if a cached version of the webpage is available.
5] Change your DNS Server
While accessing a website, if most of the pages prompt you 404 Page Not Found Error whereas all these are available on other networks such as mobile phones. In that case, either your ISP has possibly blocked access to that specific website or the DNS servers are not responding well.
So, in order to fix this issue, you may change your change DNS settings and then again try to access the site. After changing your DNS servers, check whether it fixes the error 404. If it’s still persisting then try to flush DNS Cache in your Windows devices.
6] Contact the Website
Unfortunately, if none of the aforementioned methods work for you then contacting the website representative would be the last resort.
On contacting the website representative person, ask them about the 404 Page Not Found Error you’re encountering with.
It is possible that the affected pages are moved or deleted. However, the representative person can explain well why it is occurring.
