I should mention that the server runs WSUS via an internal WSUS server and the server is not connected to the outside world.
1. Run "SFC /SCANNOW" - Done - without failures
2. Run "Windows6.1-KB947821-v34-x64.msu" - Done succesfully
3. Run "Dism /Online /Cleanup-Image /RestoreHealth" - could not run (Error 87)
4. Run "SFCFix" - Done without errors
5. DISM log attached, CBS log attached, CheckSUR log attached