Component store corrupt after w8.1 spring update

Question

hi,
I have applied  windows 8.1 pro spring update without problems. attempted to do cleanup with
 dism /online /cleanup-image /startcomponentcleanup
the system comes up with messages showing component store is corrupt , error  : 14098.     I run
 dism /online /cleanup-image /scanhealth               which answers component store is repairable. so I run
 dism /online /cleanup-image /restorehealth          and after 40% complete the  result is 
    'either  the repair source cannot be found or the component store cannot be repaired'  error: 0x800f081f . the log at
      \windows\logs\dism\dism.log   shows some text written is what I think is Japanese alphabet.
I do a system image restore disk reverting windows to its state in march, check the component store and it is healthy.
  I do the w8.1 pro spring update again.
   this puts the component store into the situation above.
  I can do a clean intstall when w8.1 pro iso is available.  any ideas?
  regards.  

Answer 1

# as an HRESULT: Severity: FAILURE (1), Facility: 0xf, Code 0x81f
# for hex 0x81f / decimal 2079 :
ecIFSDupFile ec.h
Hi,
This error code can occur when an alternative installation source is specified and one of the following conditions is true:
The location that is specified by the path does not contain the files that are required to install the feature.
The user who tries to install the feature does not have at least READ access to the location and to the files.
The set of installation files is corrupted, incomplete, or invalid for the version of Windows that you are running.
I suggest that you upload the dism.log so that we can help you analyze them.
Regards,
Kelvin Xu
TechNet Community Support