We are glad to know with latest McAfee release v16.0.R9 the issue got resolved. We will mark this discussion as resolved such that other peers might get benefitted from the solution.
McAfee Tier 2.5 Technician
Selvan is already aware as to the state of this issue; however, for those of not in 'information' loop, here's the current state of play -
At long last, McAfee Technical Support have confirmed that there is a bug in their shredding code, which is in both their Internet Security & Total Protection products.
If you try to shred a file with a <space> character in file name, the file will not be shredded; if there is no <space> character in the file name it will.
'file name.ext' will not shred
The same issue has been identified with folder names.
Obvious I know, but rename the file / folder to remove any spaces & then shred it.
McAfee are still working on a permanent fix.