blocks|key|3044708|text|在命令提示符下使用netstat+-aon或netstat+-aon+%7C+findstr+0.0:80检查哪个进程Id正在侦听端口:80，然后在任务管理器中查看该进程Id+(PID)，并选中视图->select+columns->+Process+id。结束该过程，重新启动IIS，就完成了。(注:如果您安装了Skype+Skype，请尝试先退出该进程。)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|3044709|在现代的任务管理器中，您需要转到Details选项卡来搜索PID。或者，正如@Nikita+G在注释中提到的，您可以使用此命令从命令提示符查找任务：|3044710|tasklist+/FI+"PID+eq+123"|code-block|syntax|javascript|3044711|注意:使用第一个命令返回的PID更改123。|3044712|entityMap^0|9|C|M|T|20|5|2N|V|0|G|7|0|0|I|3|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|D]|$9|Y|A|Z|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|10|8|@$9|11|A|12|B|D]]|E|@]|F|$]]|$1|I|3|J|5|K|7|13|8|@]|E|@]|F|$L|M]]|$1|N|3|O|5|6|7|14|8|@$9|15|A|16|B|C]]|E|@]|F|$]]|$1|P|3|-4|5|6|7|17|8|@]|E|@]|F|$]]]|Q|$]]

Check using <code>netstat -aon</code> or <code>netstat -aon | findstr 0.0:80</code> in a command prompt to see which Process Id is LISTENING to port :80 and then watch for that Process Id (PID) in Task Manager with view->select columns-> process id checked. End that process, restart IIS and you are done. (Note: if you have Skype installed, try exiting that process first.)

In a modern Task Manager, you need to go on the Details tab to search for the PID. Or, as mentioned by @Nikita G in the comments, you can use this command to find the task from your command prompt: 

<pre><code>tasklist /FI "PID eq 123"
</code></pre>

Note: change <code>123</code> with the PID returned from the first command.

blocks|key|201531|text|发生这种情况是因为另一个进程正在使用端口80，它可能是您PC上的聊天应用程序，如Skype。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|201532|首先，将默认网站端口从80更改为某个未使用的端口(例如8087)。要实现这一点，右键单击应用程序，然后单击“编辑绑定”。|201533|​|201534|📷|atomic|offset|length|201535|201536|201537|201538|201539|更改此端口后，再次重新启动。现在，您可以确定哪个进程阻塞了IIS端口80。要检查这一点，请使用netstat命令，该命令显示端口的详细信息以及进程ID。|201540|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/de70e7e3ab413dfd0c28f7c98d93d752.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/78aa8fbe07320e2265bcdf6e2ae26a29.png^0|0|0|0|0|1|0|0|0|0|0|1|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|14|8|@]|9|@$I|15|J|16|1|17]]|A|$]]|$1|K|3|E|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|E|5|6|7|19|8|@]|9|@]|A|$]]|$1|M|3|G|5|H|7|1A|8|@]|9|@$I|1B|J|1C|1|1D]]|A|$]]|$1|N|3|E|5|6|7|1E|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X|Y|-4]]|Z|$5|T|U|V|A|$W|10|Y|-4]]]]

It is happening because a different process is using port 80, it may be a chat application on your PC like Skype.

First, change the default web site port which was 80 to some unused port (e.g. 8087). To achieve this right click the application and then click on 'Edit Binding'.

<img src="https://i.stack.imgur.com/t1W1k.png" alt="enter image description here">

<img src="https://i.stack.imgur.com/6e1sC.png" alt="enter image description here">

After this port change restart again.
Now you can identify which process is blocking the IIS Port 80. To check this use netstat command which displays the details of port along with the process ID.

blocks|key|3044723|text|注销Skype，然后重试。我也遇到过同样的问题，我只是注销了Skype，然后重置了我的IIS。这对我很管用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3044724|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Sign out of Skype and try again. I have experienced the same issue and I just logged out of Skype and then reset my IIS. It worked for me.

blocks|key|200862|text|您还可以运行此命令来找出哪个应用程序或服务正在使用该端口，然后在任务管理器中跟踪它(假设它不是Web+Deploy代理服务)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|200863|netstat+-o+-n+-a+%7C+findstr+0.0:80|200864|然后打开任务管理器，转到进程，单击“显示所有用户的进程”复选框，然后单击视图菜单，转到列，添加PID列。|200865|将netstat命令中的进程ID与任务管理器中的PID进行匹配，您将找到正在使用该端口的服务或应用程序。|200866|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

You can also run this command to find out which application or service is using the port and then trace it down in Task manager (Provided it's not the Web Deploy Agent Service).

netstat -o -n -a | findstr 0.0:80

Then open Task manager, go to Processes, click the "Show processes for all users" checkbox and then click the View menu and Go to the Columns, add the PID column.

Match the Process ID from the netstat command to the PID in task manager and you will find the service or application that's using the port.

blocks|key|200934|text|正如其他人所说，可能是其他原因在使用端口80或443。对于我来说，这是VMWare工作站服务器，但请查看其他答案以了解如何使用netstat。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|200935|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

As others have said, something else may be using port 80 or 443. It was VMWare Workstation Server for me, but check other answers for how to use netstat.

blocks|key|3044865|text|我认为这个链接很好地解释和解决了这个问题http://support.microsoft.com/KB/890015|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3044866|大多数情况下，这是由以下两个原因之一引起的:+1)端口80正在被其他东西使用，根据其他人的建议，您可以使用netstat+-o+-n+-a+%7Cfindstr+0.0:80来查看是否是这种情况。如果是，则在任务管理器中终止进程(勾选显示所有用户的进程)|3044867|2)如果未使用端口80，第二个原因可能是HTTP->Parameters注册表项的ListenOnlyList字段中的ip地址无效。如果您按照链接手动设置密钥，或者实际上可以使用(xp和server+2003)+httpcfg+delete+iplisten+-i+ipaddress删除无效的ip地址。编辑ipaddress后，必须重新启动http！|style|CODE|3044868|entityMap|0|LINK|mutability|MUTABLE|url|http://support.microsoft.com/KB/890015^0|K|12|0|0|0|2Y|10|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|W|8|@$A|X|B|Y|H|I]]|9|@]|C|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]]]

I think this link gives a pretty good explanation and fix of this problem <a href="http://support.microsoft.com/KB/890015" rel="nofollow">http://support.microsoft.com/KB/890015</a>

Most of the time; it's caused by one of the two reasons:
1) port 80 is being used by something else and as suggested by others you can use netstat -o -n -a |findstr 0.0:80 to see whether this is the case. If yes then kill the process from task manager (tick show processes from all users)

2) if port 80 is not used, the second cause is potentially an invalid ip address in the ListenOnlyList filed in the registry key of HTTP->Parameters. If you follow the link to set the key manually or in fact you can use (xp and server 2003) <code>httpcfg delete iplisten -i ipaddress</code> to delete the invalid ip address. 
You must restart the http once you edit the ipaddress!

blocks|key|200878|text|在我的例子中，运行并使用端口80的是"Sync+Share+Service“(SyncShareSvc)。不过，netstat显示80是免费的。我可以让站点在另一个端口上运行，但不是80。如果我添加了一个主机名，IIS将允许我启动该站点，但是当我浏览到localhost+(或我添加的任何主机名)时，系统会提示我进行摘要式身份验证。仅在IIS中启用了匿名和表单身份验证...|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|200879|我还发现，在停止IIS之后，http://localhost仍然提示我进行摘要式身份验证。|style|CODE|200880|在我的案例中，解决方案是从安装的服务中删除文件和存储服务>文件和iSCSI服务>+"Work+Services+(需要重启)“。|BOLD|200881|在删除“工作文件夹”服务并重新启动后，IIS按预期工作。|200882|entityMap|0|LINK|mutability|MUTABLE|url|http://blogs.technet.com/b/filecab/archive/2013/10/15/windows-server-2012-r2-resolving-port-conflict-with-iis-websites-and-work-folders.aspx^0|J|I|0|0|E|G|0|L|17|0|0|S|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@$A|Z|B|10|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|11|8|@$A|12|B|13|F|J]]|9|@]|C|$]]|$1|K|3|L|5|6|7|14|8|@$A|15|B|16|F|J]]|9|@]|C|$]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

In my case, it was the "<a href="http://blogs.technet.com/b/filecab/archive/2013/10/15/windows-server-2012-r2-resolving-port-conflict-with-iis-websites-and-work-folders.aspx" rel="nofollow">Sync Share Service</a>" (SyncShareSvc) that was running and using port 80.
netstat showed 80 as free, though. I could get the site to run on another port, but not 80. if I added a Host name, IIS would allow me to start the site, but I'd get prompted for Digest authentication when browsing to localhost (or any host name I added). Only Anonymous and Forms Auth were enabled in IIS...

I also found that, after stopping IIS, <code>http://localhost</code> still prompted me for Digest authentication.

The solution - in my case - was to remove File and Storage Services > Files and iSCSI Services > 
"Work Folders" from the services installed (restart required).

After removing the "Work Folders" service and restarted, IIS worked as expected.

blocks|key|3044878|text|我的案例是在安装RD+Web+Access后，原来的默认网站无法启动。已删除RD+Web访问角色，但仍保持不变。删除端口443绑定解决了此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3044879|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My case was after installing RD Web Access, the original default websites couldn't be started. Removed the RD Web Access role still same. Removed port 443 binding solved the issue.

blocks|key|201632|text|大多数情况下，web开发人员发生这种情况的原因是apache，所以如果您从apache转到配置文件！打开它，用ctrl+%2Bf搜索到80，把你看到的ip改成8080，下面的句子改成80到8080，你需要在你的xampp或你当前使用的程序中进行配置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|201633|希望我能帮到你们|201634|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Most times when this happens by web developers is the reason apache, so if you go to the config file from apache! open it up and search with ctrl + f to 80 and change the ip you will see to 8080 and the sentence beneath there with 80 to 8080 and you need to confige that in you xampp, or the program u are using currently

Hope I'll help u guys out

blocks|key|198618|text|为了获得更有意义的信息，一种方法是在发出netstat时也获取所有权信息，以便您知道正在使用80+(默认http绑定)或443+(如果定义了https绑定)的进程：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|198619|+netstat+-ab|code-block|syntax|javascript|198620|在我的例子中，罪魁祸首是vmware：|198621|198622|+TCP+0.0.0.0:443计算机名:0侦听|blockquote|198623|198624|vmware-hostd.exe|198625|198626|netstat可以通过管道进入find来搜索端口80或443+(例如find+":443")，但这些特定的活动连接将显示在列表的开头，因为它们很容易看到。|198627|entityMap^0|K|7|0|0|0|0|0|0|0|0|Y|B|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|13|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|14|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|16|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|W|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|X|$]]

In order to get more meaningful information, one way is to also get ownership information when issuing <code>netstat</code> so that you know the process which is using either 80 (default http binding) or 443 (if https binding is defined):

<pre><code> netstat -ab
</code></pre>

In my case the culprit was vmware:

<blockquote>
 TCP 0.0.0.0:443 ComputerName:0 LISTENING 
 [vmware-hostd.exe]
</blockquote>

netstat can be piped into find to search for ports 80 or 443 (e.g. <code>find ":443"</code>), but these particular active connection will show at the beginning of the list at they are easy to see.

When I try to start a site in IIS it says: 

<blockquote>
 the process can't access the file because it used by another process
</blockquote>

I searched in Google and found that another site may have been using Port 80 but in MyIIS I see that only this site is using Port 80. What else could be using Port 80 or is there another issue involved?

Can't start site in IIS (use by another process)

身份验证

服务器

当我尝试在IIS中启动一个站点时，它会说：该进程无法访问该文件，因为该文件正被另一个进程使用我在谷歌中搜索，发现另一个网站可能一直在使用端口80，但在MyIIS中，我看到只有这个网站在使用端口80。使用端口80可能还存在什么其他问题，或者是否涉及其他问题？

问无法在IIS中启动网站(由其他进程使用)
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