If you’re unable to open/view roles in Server Manager (Windows Server 2008) , the problem might be with a patch which was not installed properly Or the server is not rebooted for long time after patches installation. Here are the steps to be followed to resolve the error.
a. In server manager you can not see any roles or features that are installed and in the bottom of the screen there is an error that says:
Last refresh: Failed Enable Error Details
b. When you click on Error Details you’ll see the following error :
Unexpected error refreshing Server Manager: No signature was present in the subject. (Exception from HRESULT: 0x800B0100)
a. This step can be done by using a new tool developed by Microsoft to resolve these kind of issues :
The content of this log :
Checking Deployment Packages
Checking Package Manifests and catalogs.
Checking package watchlist.
Checking component watchlist.
Checking packages.(f) CBS MUM Missing 0x00000002 servicing\packages\Package_for_KB951978_server_0~31bf3856ad364e35~amd64~~184.108.40.206.mum (f) CBS MUM Missing 0x00000002 servicing\packages\Package_for_KB951978_server~31bf3856ad364e35~amd64~~220.127.116.11.mum (f) CBS MUM Missing 0x00000002 servicing\packages\Package_for_KB951978~31bf3856ad364e35~amd64~~18.104.22.168.mum
Checking component store Checking SMI StoreSummary:Milliseconds: 197278Found 3 errors CBS MUM Missing Total Count: 3
Checking component store
a. Download the KB Update as we need to extract files from it. In your Update History you can find this update fast as it is listed as the first failed update that happened :
b. Now double click this update.
c. Click on the link to the KB Article, this link will open internet explorer and just scroll down to the download links on the page :
d. Download the related package, rename the extension of the file from MSU to CAB
e. Open the file
f. Extract the CAB file to another location for example c:\temp
a. First we need to unprotect the packages directory so we can copy files to it
right click “Packages” Folder and choose properties, select tab security, click advanced and click on the tab “Owner”
b. As you can see the correct owner (trusted installer) is listed, for now you need to change the ownership to your own account. When done, you will be returned to the security overview, add yourself with full control permission to the folder
And the Roles can be viewed again :
Don’t forget to set the rights of the Packages folder back to how they were.