Posting back with results in case may be of help to others :0)
I ran the DISM command & the operation completed successfully. CheckHealth & ScanHealth both came back Healthy, Yay! So apparently there really was corruption.
Code:
Windows PowerShellCopyright (C) 2015 Microsoft Corporation. All rights reserved.
PS C:\WINDOWS\system32> Dism /Online /Cleanup-Image /RestoreHealth /Source:wim:K:\sources\install.wim:1 /limitacc
Deployment Image Servicing and Management tool
Version: 10.0.10586.0
Image Version: 10.0.10586.0
[==========================100.0%==========================]
The restore operation completed successfully.
The operation completed successfully.
PS C:\WINDOWS\system32> Repair-WindowsImage -Online -CheckHealth
Path :
Online : False
ImageHealthState : Healthy
RestartNeeded : False
PS C:\WINDOWS\system32> Repair-WindowsImage -Online -ScanHealth
Path :
Online : False
ImageHealthState : Healthy
RestartNeeded : False
One note: Altho I downloaded the TechBench ISO to drive letter J: when mounted it showed on drive letter K:? I went to install.wim on the J: drive & using a trick I learned from Edwin = to fetch the 'path' yourself the easiest way is: navigate to the item, Shift/Right Click/Copy as Path and Paste into the dialog but remove the quotation marks.
The path it copied was in fact K:\sources\install.wim. I was a little confused as to what the full path name to install.wim might be but the Shift/Right Click/Copy as Path and Paste removed all doubt.
Ran another sfc/ scannow & it did repair successfully this time:
Code:
2016-02-07 11:54:49, Info CSI 000050c2 [SR] Beginning Verify and Repair transaction2016-02-07 11:54:51, Info CSI 00005112 [SR] Verify complete
2016-02-07 11:54:51, Info CSI 00005113 [SR] Repairing 1 components
2016-02-07 11:54:51, Info CSI 00005114 [SR] Beginning Verify and Repair transaction
2016-02-07 11:54:51, Info CSI 00005116 [SR] Repairing corrupted file [l:23 ml:24]"\??\C:\WINDOWS\SysWOW64"\[l:10]"opencl.dll" from store
2016-02-07 11:54:51, Info CSI 00005118 [SR] Repair complete
2016-02-07 11:54:51, Info CSI 00005119 [SR] Committing transaction
2016-02-07 11:54:51, Info CSI 0000511e [SR] Verify and Repair Transaction completed. All files and registry keys listed in this transaction have been successfully repaired
Restarted the PC, ran another sfc /scannow & now we happily see Windows Resource Protection did not find any integrity violations.
So in my case anyway the nVidia driver issue & hash mismatch for opencl.dll was probably best not ignored as I did appear to actually have a problem.
Thank you ten forums
:)