Windows 2008 R2 Standard Server. Server manager's Role and Features show error. Yet, the patches were installed successfully. I have tried to reinstall the patch, the system said "it's already installed" I tried to install "MS update readiness tool" patch, it failed to install. Any idea, suggestion? Thanks Windows update "Hotfix for Windows (KB947821)" could not be installed because of error 2147944003 "Fatal error during installation." (Command line: ""C:\Windows\system32\wusa.exe" "C:\temp\Windows6.1-KB947821-v22-x64.msu"