Having received this error notice after unsuccessfully attempting to add accounts to the W10 mail icon on startup, I ran the verification process. Everything was OK except these:

Cannot repair member file [l:16{8}]"xbox.css" of Microsoft-Windows-CloudExperienceHost.AppxMain, Version = 10.0.10240.16384, pA = x86, nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35} in the store, hash mismatch
2015-09-30 12:57:11, Info CSI 00000f3f [SR]

Cannot repair member file [l:16{8}]"xbox.css" of Microsoft-Windows-CloudExperienceHost.AppxMain, Version = 10.0.10240.16384, pA = x86, nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35} in the store, hash mismatch


Since I have no intention of ever using an X-Box, can I safely delete these aberrations? Thanks, Roger Marchant