malwarebytes tray application is the only 'different' thing left, and this appears to have worked... I haven't tried running it again to confirm as I have a WD episode to get through first 
then I'll play...
I had already checked the snipping tool wasn't running though and also closed a few things I didn't know what they were, to no avail, then when rechecking I realised Malwarebytes had been working previously during the trial..., and then working after the trial so limited functionality... however something prompted a Malwarebytes reinstall today and therefore I appear to have a new trial, and the tray applkication was 'running' all beit that just means its in the tray... nothing active as such..., but the player was happy once this was closed and nothing else was changed since the last error /failure..
if you do have a list of known issues though, please list it here for me/us? your link from another thread says virtually the same as the actual error message rather than a list so it would be really helpfull if there is a list?
thanks for your assistance anyway 