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IIS suddenly not working after Windows 10 update

Posted on 2016-10-03
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Last Modified: 2016-10-04
Hello all,
I have been using IIS on my PC (Running Windows10) for developing my Classic ASP web sites for several months with no problems. Then last Friday there was a Windows 10 update which seemed fine until I tried to run any of my websites. I now get this error:
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HTTP Error 503. The service is unavailable.
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It is extremely bad timing ā€¦ sometimes I could kill Microsoft!

Any advice would be very welcome.

On Thursday it all worked well.

Kind regards

Abiel de Groot Sanders
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Question by:Abiel de Groot
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LVL 7

Expert Comment

by:Gauthier
ID: 41825971
Check the Event Log, you may have a module which need upgrading
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LVL 37

Expert Comment

by:bbao
ID: 41826037
commonly this error occurs if the application pool that is associated with your web application doesn't start, probably caused by a configuration change in a updated IIS component. you may try checking  Windows System Log to find errors from the Microsoft-Windows-WAS source. if your application pool fails to start, it should be logged there.
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Accepted Solution

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RK earned 500 total points
ID: 41826039
Hi,

Looks like the latest Windows update installed or upgraded the 'IIS URL Rewrite Module2' ? You can confirm this in Add/Remove features section. If this is the case then uninstalling the existing version of 'IIS URL Rewrite Module2' then install it back from 'Web platform installer' >select Url Rewrite from Products from server section and install.

If the issue still persists, I would suggest to uninstall all the latest windows updates (just prior to the issue) from the machine and test
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LVL 54

Expert Comment

by:McKnife
ID: 41826052
First thing to do is of course to open Services.msc and check whether the IIS Service is still running.
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LVL 37

Expert Comment

by:bbao
ID: 41826060
> check whether the IIS Service is still running.

it must be running otherwise the user could not see that error message in the browser, hehe.
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LVL 5

Author Comment

by:Abiel de Groot
ID: 41826145
Hi Guys. I will go over these one by one. I will get back to you.
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LVL 54

Expert Comment

by:McKnife
ID: 41826336
It could be that the ACL for the url got corrupted.
See https://blogs.msdn.microsoft.com/dparys/2009/02/05/service-unavailable-http-error-503-mit-iis-7-auf-windows-7/ (this is in german). So either use google translator on that site or follow my quick guide:
1 open an elevated cmd
2 netsh [Enter] http [Enter]
output and find the section that corresponds to the encircled section in my link, and copy and paste it to a text file in order to be able to restore it (just in case the next action does not solve it)
3 netsh http delete urlacl url=http://+:80/

Good luck.
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LVL 5

Author Comment

by:Abiel de Groot
ID: 41828469
Sorry for the delay but Finally got the problem solved, with professional help.

Firstly might I strongly discourage anyone from seeking help from Microsoft, in the form of their Assure Tech support at $150. (I would have paid 10 times that) They took control of my PC and left it in a state where it would not even start.

The Server cure was 'IIS URL Rewrite Module2' Thank you Radhakrishnan Rajayyan

However, further authentication issues were solved by resetting permissions on the both the root folder wwwroot and the database folder.

Many thanks

Abiel M de Groot Sanders
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Author Closing Comment

by:Abiel de Groot
ID: 41828473
Many thanks
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