Deleted the key without any errors and it has not come back after about 10 hours continuous running.
I have 2 accounts on this m/c. My normal one which is set up as a LUA which is for everday use, and an Admin account which I use for backups, software install/updates and similar.
Logging on and off each account - without booting - does not bring back the registry keys either.
I've looked back through the SD history logs. Last clean run was on 25/11 at 13:28. Next run was on 26/11 at 16:43, that found the 3 keys.
Between those two date/times I downloaded 2 sets of SD updates -
spybotsd.ini, english.zip, includes.zip, includesb.zip on 25/11: and includesb.zip on 26/11.
Is it possible that those mchinjdrv keys had been appearing on my machine for a long time, but only show up now after new searches were added to SD in one of those downloads?
Mike