You are unable to view Roles and Features and receive error code 0x800706BE in Server Manager

check this article.

1. Microsoft Update Readiness Tool. http://support.microsoft.com/kb/947821
2. Check C:\Windows\logs\CBS\Checksur.log
3. takeown /F c:\Windows\Servicing\Packages /D y /R
4. cacls c:\Windows\Servicing\Packages /E /T /C /G "UserName":F
5. Download the KB Files for the missing files:
6. Expand -F:* UpdateKBXXXX.msu x:\DestinationDirectory
7. Expand -F:* UpdateKBXXXX.CAB x:\DestinationDirectoryCAB
8. Copy missing or corrupted files.