I don't get it, them gremlins are sure playing funny.
I did everything you said the first time round to no joy, running cmd I got 'No file found'.... yet this afternoon I simply dragged the aswSnx file into the system 32 driver folder as before... and presto the error's gone at every boot up.
Just can't think what I've done different, apart from downloading the file again, certainly no errors in Events now.
Thanks for putting up with me pk, I do appreciate the time you spent.
Best wishes, Dave