After installation of optional update KB3022345, executing sfc.exe /scannow throws the following result message (see attached screenshot):
I can reproduce this on three different machines, all Win 8.1, all fully patched, they are a mix of 64 and 32 bit systems.
The error disappears on all my machines when I uninstall the KB3022345 update.
Moderators please feel free to move this message to an other board in case I posted this in the wrong one.