Without the DxDiag results that are requested in the Read Me Before Posting sticky thread, it's hard to know what might be happening.
My guesses are that something went wrong when you downloaded the patch, or there are problems with Windows on your PC. The first thing to try is to clear your browser's cache, delete the original patch, then download and try installing it again.
If you get the same error, run
sfc /scannow from an Admin-level command prompt (Google for more details if needed). That will check Windows' crucial system files and will repair many kinds of errors if they're present. You should run it again if it reports that it found errors, but couldn't repair them all the first time through.
You also might want to try running
dism /online /cleanup-image /scanhealth in the same window. This will do a more comprehensive set of verifications and repairs. Once those are finished, try installing the patch again.
This message was edited 1 time. Last update was at Mar 28. 2020 19:54
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