# Sites are down – IIS configuration Error.Follow

## Created:

2016-11-16 12:41:00 UTC

## Modified:

2017-04-24 11:03:30 UTC
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# Sites are down – IIS configuration Error.

## Applicable to:

• Plesk for Windows
• Plesk 10.4 for Windows
• Plesk 11.0 for Windows
• Plesk 11.5 for Windows
• Plesk 12.0 for Windows

## Symptoms

The IIS service does not respond. Websites and the Control Panel are down.

The following error is shown in IIS Manager:

``    Filename:    \\\\?\\C:\\Windows\\System32\\inetsrv\\config\\applicationHost.config    Error: Cannot write configuration file``

Or:

``    There was an error while performing this operation.    Details:     Filename: \\\\?\\C:\\Windows\\system32\\inetsrv\\config\\applicationHost.config    Line number: 1517    Error: Configuration file is not well-formed XML``

Note: The file path may differ from the above examples.

## Cause

This issue may occur if there is not enough disk space on the server. The file path may vary from the one above, but, essentially, the error means that IIS has failed to write to one of its configuration files ( ``` 'C:\\Windows\\System32\\inetsrv\\config\\applicationHost.config' ``` in the above example).

## Resolution

Free up some disk space and restore the latest IIS configuration backup.

Example commands for IIS 7:

``cd %windir%\\System32\\inetsrvC:\\Windows\\System32\\inetsrv>appcmd list backupBACKUP "CFGHISTORY_0000000054"BACKUP "CFGHISTORY_0000000055"…BACKUP "CFGHISTORY_0000000062"C:\\Windows\\System32\\inetsrv>appcmd restore backup CFGHISTORY_0000000062Restored configuration from backup "CFGHISTORY_0000000062"``

NOTE: The file at the bottom of the list is usually the latest one. However, to confirm this, you may check the creation date. The backups are stored in ``` 'C:\\Inetpub\\history' ``` by default.

If your restoration fails with the following error:

``    ERROR ( hresult:80070005, message:Command execution failed.    Access is denied.     )``

Disable the ``` 'Read Only' ``` attribute on the ``` 'C:\\Windows\\System32\\inetsrv\\config\\schema\\rewrite_schema' ``` file.

Restart IIS after restoring the configuration:

``iisreset /restart``