I did a routine 'sfc/scannow' in an admin window.

Then I filtered to get the relevant info...here are the only 2 NON-successful lines:

2016-05-10 08:09:18, Info CSI 00002b2f [SR] Cannot verify component files for Microsoft-Windows-User-PnpEvents, version 10.0.10586.0, arch amd64, nonSxS, pkt {l:8 b:31bf3856ad364e35}, manifest is damaged (TRUE)

2016-05-10 08:18:37, Info CSI 00005402 [SR] Cannot verify component files for Microsoft-Windows-User-PnpEvents, version 10.0.10586.0, arch amd64, nonSxS, pkt {l:8 b:31bf3856ad364e35}, manifest is damaged (TRUE)

and at the end, the log says:

2016-05-10 08:18:41, Info CSI 0000540d [SR] Verify and Repair Transaction completed. All files and registry keys listed in this transaction have been successfully repaired

So, are these 'manifest damaged' entries something to worry about?