I recently came across the following error when trying to run Windows updates (Windows 7 Pro).
I came across this article from Microsoft which then pointed me to the System Update Readiness Tool. After running the System Update Readiness tool my Windows updates went through sucessfully.
If you receive Windows Update error 80070490, it means that a file (CBS Manifest) that’s needed to install updates is corrupt.
The System Update Readiness Tool for Windows can correct some conditions that causeWindows Update error 80070490. To learn more about this tool, go to What is the System Update Readiness Tool? on the Windows website.
The System Update Readiness Tool can help fix problems that might prevent Windowsupdates and service packs from installing. For example, an update might not install if a damaged system file prevents the update from recognizing the version of Windows that’s running on your computer.
If your computer is having problems installing an update or a service pack, download and install the tool, which runs automatically. Then, try installing the update or service pack again.