Well, you've got your work cut out for you now.
https://answers.microsoft.com/en-us/windows/forum/windows_other/error-code-80070490-when-installing-windows/c1fea6da-9c98-4194-af64-be69de5e9c6d
80070490 Corrupted CBS (Component Based Servicing) manifest.
And it's Windows 7, Lacking the restorehealth option on DISM.
DISM repairs WinSXS, the CBS folder with all the packages in it.
Either the manifest is in SoftwareDistribution, or it's in WinSXS.
The people in that thread tried the Windows Update Troubleshooter
and that didn't help, so it's probably not SoftwareDistribution.
The System Update Readiness tool (surcheck or checksur), is a
(rough) equivalent of DISM restorehealth. Select the correct
bitness for your OS. The file is at least several hundred megabytes.
https://support.microsoft.com/en-ca/help/947821/fix-windows-update-errors-by-using-the-dism-or-system-update-readiness
Operating system Download link
---------------- -------------
x86-based (32-bit) versions of
Windows 7 SP1 and Windows 7 Download icon
x64-based (64-bit) versions of
Windows 7 SP1 and Windows 7 Download icon
These are "mostly harmless" installs. If they fix you up, fine.
If they don't, fine. If it says something about "not for this OS",
verify you grabbed the correct one.
Try the Windows Update Troubleshooter, from the Troubleshooter
control panel, after you've tried that, if you're still having
problems.
Paul