A free Microsoft tool is available for download, designed to resolve failed installations of the second service pack for Windows Vista and Windows Server 2008. When you try to install Windows Vista Service Pack 2 or Windows Server 2008 Service Pack 2, you receive following error code: 80070490. To resolve this problem, run System Update Readiness Tool (Checksur.exe), explained KB976920.

Download: Windows6.0-KB947821-v5-x86 | Windows6.0-KB947821-v5-x64 | Windows6.0-KB947821-v5-ia64Fi