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Windows Update error 0x80070003 Click  Start  (Press “ Windows Key  +  Q ” to open Charms Bar.) Type:  cmd Right click on cmd in start menu and select 'Run as Administrator' Type:  net stop wuauserv Hit Enter Type:  ren c:\windows\SoftwareDistribution softwaredistribution.old Hit Enter Type:  net start wuauserv Hit Enter Type:  exit Hit Enter Attempt to download updates . Source: http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_update/windows-update-error-0x80070003/8badf153-81d8-4d9c-a864-0fa214b8cdc3 -- Cheers !!!