Error 80070002 Definition: Windows Update Error 80070002 Usually occurs while trying to use Windows Update to update system file and security updates in Windows XP, Windows Vista and Windows 7. Error code 0x80070002 can also occurs when trying to install a new service pack (sp1, sp2, sp3) in those Windows operating systems listed above.
Windows Vista and Windows 7 operating systems (Windows XP as well) are backing up critical system files that are needed to start Windows by using The %WinDir%\WinSxS\Backup cache storage. If the back is accidently deleted or for some other reason cannot be found, Windows update will be unable to check for updates and you will receive error message 80070002.
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