Had run into an issue where the calculator app (Win10) opened on its own on boot and after wake. Check with Ms support, they suggested run SFC scan and it turned out that the Windows.UI.Logon file had been corrupted.
Thankfully, I did have a .bak of it, so I swapped it out, and it seems to have fixed the calculator issue. However, SFC is still reporting a corrupted file, as well as a non-matching hash from the windows library.
SFCFix.exe returns no corruption, but the CBS log disagrees.
/*SFCFix Log Begin*/
SFCFix version 2.4.5.0 by niemiro.
Start time: 2015-09-03 18:50:38.309
Microsoft Windows 8.1 - amd64
Not using a script file.
AutoAnalysis::
SUMMARY: No corruptions were detected.
AutoAnalysis:: directive completed successfully.
Successfully processed all directives.
SFCFix version 2.4.5.0 by niemiro has completed.
Currently storing 0 datablocks.
Finish time: 2015-09-03 18:55:24.846
----------------------EOF-----------------------
