English version

When you try to add a role or feature the following message error is displayed:

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Server Manager
Unexpected error refreshing Server Manager: Exception from HRESULT: 0x800F0818
For more information, see the event log: Diagnostics, Event Viewer, Applications and Services Logs, Microsoft, Windows, Server Manager, Operational.

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Steps to fix the issue:

 • Install checksur (System Update Readiness Tool)  - http://support.microsoft.com/kb/947821

 • Open the Checksur.log located on C:\Windows\Logs\CBS
 • On checkusr.log you will find something like that
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Unavailable repair files:
 servicing\packages\Package_for_KB2545698_RTM~31bf3856ad364e35~amd64~~6.1.1.3.mum
 servicing\packages\Package_for_KB2545698_RTM~31bf3856ad364e35~amd64~~6.1.1.3.cat
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So the corrupted files in this case are:


servicing\packages\Package_for_KB2545698_RTM~31bf3856ad364e35~amd64~~6.1.1.3.mum
servicing\packages\Package_for_KB2545698_RTM~31bf3856ad364e35~amd64~~6.1.1.3.cat


 If you have another 2008 R2 Server running fine, you can copy the files from this server and replace these files on problematic server

You must run the following commands on problematic machine to get the onwership and set permissions on C:\Windows\Servicing\Package

takeown /F c:\Windows\Servicing\Packages /D y /R
cacls c:\Windows\Servicing\Packages /E /T /C /G "UserName":F

After this copy the files from desktop to C:\Windows\Servicing\Package and replace the old files.
In the most of cases just the these steps fix the issue. Sometimes you can get a the following message error:

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Server Manager
Unexpected error refreshing Server Manager: The default authentication level for Component Services is currently set to None. It is recommended that you change this setting to Connect. To change the default authentication level, click Start, point to Administrative Tools, and then click Component Services. In the Component Services snap-in hierarchy pane, expand Component Services, expand Computers, right-click My Computer, and then click Properties. In the Properties dialog box, on the Default Properties tab, change the default authentication level to Connect.

For more information, see the event log: Diagnostics, Event Viewer, Applications and Services Logs, Microsoft, Windows, Server Manager, Operational.
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 • So followed the instruction provided on message:

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To change the default authentication level, click Start, point to Administrative Tools, and then click Component Services. In the Component Services snap-in hierarchy pane, expand Component Services, expand Computers, right-click My Computer, and then click Properties. In the Properties dialog box, on the Default Properties tab, change the default authentication level to Connect.
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 • After this you will be able to open the server manager
 • Server manager must work fine and now you can  add features and roles.