Use the System Update Readiness Tool or the DISM tool to fix problems that prevent Windows Update from installing successfully.
Describes how to reset the Windows Update components.
Troubleshoot error code 0x80070490
Describes how to troubleshoot the problem where you are repeatedly offered the same update in Windows Update or Microsoft Update.
Diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall and other Windows security options and features.