Aha! Yesterday's virus update of MS Defender led indeed to a MP2 file being quarantined. Details can be found here: https://forum.team-mediaportal.com/...er-killed-directshow-dll.134506/#post-1186736What I did notice earlier and ignore was some message from MS Defended saying it had protected me from something.
In all fairness, 9 out of 56 online virus scanners - not just MS - report the DShowWrapper as infected. And that was yesterday. I haven't verified if others have adjusted.It is friging annoying but to lose hours because MS are useless.