IIS 7.5 Unable to write configuration file

Question

I have a fault regarding IIS 7.5 on Win Server 2008 R2, whenever I try to change any site bindings or start an application pool I get the error below:

Filename: \\?\C:\Windows\system32\inetsrv\config\applicationHost.config
Error: Cannot write configuration file

the application pools run as network service. None of the sites that are running have been affected however their configuration cannot be changed

UPDATED 05/10/2012

A reboot fixed this issue, however I am curious to know what caused it in the first place.

UPDATE 09/04/2013 The server is no longer in production.

Have you checked the permissions on the applicationHost.config file? — Bernie White, Oct 04 '12 at 21:47
Yes the permissions where fine, but I am still interested in any answers as to the cause. — flumeware, Oct 05 '12 at 15:38
In my case, the server had run out of free space, and freeing up space fixed the problem. — Alexander Puchkov, May 13 '15 at 16:27

score 15 · Answer 1 · answered Jul 15 '15 at 10:39

15

I had the same problem - turned out we'd just run out of disk space.

answered Jul 15 '15 at 10:39

PaulB

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David McDuff · Answer 2 · 2013-04-09T15:45:09.710

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App Fabric can cause a Issue like that:

http://forums.iis.net/t/1178705.aspx/1

edited Apr 09 '13 at 15:45

answered Apr 09 '13 at 15:32

David McDuff

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Thanks for the info, however app fabric is not installed. Please see comments on above question, the question is no longer relevant to me. – flumeware Apr 09 '13 at 16:35

score 0 · Answer 3 · answered Mar 02 '18 at 20:58

0

Have you had any changes to your virus protection policy lately? The actual file that can't be written to is at c:\users\\AppData\Local\Temp\iisexpress. I had our security team re-open access to that directory, just for developers and that fixed it.

answered Mar 02 '18 at 20:58

John-Lausten

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IIS 7.5 Unable to write configuration file

3 Answers3