After the latest updates to Windows 10, users are reporting
that SFC /scannow command is unable to fix the corrupted files.
The sfc /scannow is a command to scan system or general files,
and fix the corrupted files by replacing them with a cached
According to reports from forums (1,
Windows 10 SFC /scannow fails after completing the
verification. We were able to reproduce the bug on all of our
systems, including Virtual Machines with Windows 10 Build
18362.239 and latest Windows Definitions Update installed.
The error states that Windows Resource Protection found corrupt
files but it was unable to fix some of them and it recommends
users to check CBS log file for additional details.
The CBS.log file states that the process failed because of hash
mismatch and this could happen when the hashes of the files do
not match the files in the WinSxS folder.
“Interesting. I am having the exact same issue of corrupt files
in sfc on all four Windows 10 laptops today and actually came
on here to see if it was just me,” a user noted in a forum
It appears that the problem is associated with the latest
definition updates for Windows Defender. Some users also
reported that the bug is also hitting Windows 10 version 1809
(October 2019 Update) devices with the latest definition for
Microsoft hasn’t acknowledged the problems with SFC /scannow,
but it is very likely that the bug will be resolved in a few